This appeal is from a decision of the Patent Office Board of Appeals affirming the examiner's rejections of claims 1-121 "for lack of utility under 35 U.S.C. 101" and of claims 1-6, 11, and 12 as obvious under 25 U.S.C. § 103 in view of certain prior art.

The invention relates to particular chemical compounds, the d- and 1- isomers of α-ethyltryptamine (hereafter denoted by its generic name, etryptamine); therapeutic compositions containing certain amounts of one of the two pure isomers or their racemic mixture in combination with a pharmaceutical carrier; and methods of using those compositions in treating mental depression in humans. Claims 1 and 7 are representative:

1. A therapeutic composition comprising: as the primary active ingredient, from about 5 to about 300 mg. of a compound selected from the group consisting of α-ethyltryptamine and physiologically acceptable acid addition salts thereof, dispersed in a pharmaceutical carrier.

7. A method for treating mental depression which comprises: administering, in unit dosage form, a composition containing from about 5 to about 300 mg. of a compound selected from the group consisting of α-ethyltryptamine and the physiologically acceptable acid addition salts thereof, dispersed in a pharmaceutical carrier to a depressed subject.

Inasmuch as the issues are quite diverse, we shall treat them separately.

British specification (Young), 807, 876, January 21, 1959.

Snyder, J. Am. Chem. Soc., Vol. 69, pages 3140-3142 (1947).

Karrer, Organic Chemistry, 2nd Ed., pages 92-102 (1946).

Appellant has acknowledged, both below and here, that Young and Snyder each disclose the racemic mixture of etryptamine per se to be known to the art. Young, for example, discloses a process for preparing various indoles including, inter alia, 3-beta-aminobutylindole, another name for etryptamine. The indole compounds in general are said to be useful "as pharmaceutical products and also as intermediates in the manufacture of compounds of pharmacological utility, particularly of 5-hydroxytryptamine." Snyder, on the other hand, discloses techniques for the preparation of various derivatives of tryptamine including, among other things, the acetate of etryptamine. The various derivatives of tryptamine disclosed by Snyder are said to be "of interest * * * because of the physiological activity of the parent base."

The examiner rejected claims 1-6, 11 and 12 as obvious in view of either Young or Snyder alone or considered with Karrer. In the examiner's view, Young and Snyder state that etryptamine is "useful as a pharmaceutical product" and that the acetates of tetryptamine are of interest "because of their physiological activity." Under those circumstances, it would be a routine matter, the examiner thought, for one of ordinary skill in the art to prepare therapeutic compositions containing a pharmaceutical carrier and the racemic mixture of etryptamine or, in light of Karrer's discussion of separating optical isomers of a racemic mixture, to isolate the individual isomers and prepare therapeutic compositions containing them. The board agreed.

With respect to claims 11 and 12, directed to the d- and 1- isomers of etryptamine per se, appellant acknowledges here that those claims are unpatentable on the record since "under existing law a stereoisomer is not patentable over its known racemic mixture unless it possesses unexpected properties not possessed by the racemic mixture."2 He asks this court to remand the case to the Patent Office for consideration of new evidence in the form of an affidavit of one Stucki, filed after the board's decision, which appellant apparently believes now shows that the d- and 1- isomers have different, perhaps unexpected, properties. The board refused to consider the affidavit because, in its view, appellant had neither proceeded in accordance with the governing Rules of Practice of the Patent Office nor timely filed that document. We agree with the board's stated reasons for refusing to consider the affidavit, and appellant does not ask us to consider it in the first instance here. Cf. In re Pantzer, 341 F.2d 121, 52 CCPA 1135 (1965). Inasmuch as appellant seemingly was aware of the necessity for such evidence early in the prosecution, and the affidavit does not appear to be in response to any new ground of rejection under § 103 advanced for the first time by the board,3 appellant's request for remand is denied, although he perhaps is not without further recourse.4 The rejection of claims 11 and 12 under § 103 is affirmed.

Insofar as the rejection of claims 1-6 is concerned, appellant argues that the two prior art references employed by the Patent Office do not suggest any general or specific therapeutic use for any specific compound, and are so vague as not to provide any meaningful teaching by which the claimed compositions are rendered obvious to one of ordinary skill in the art. The board's reliance on In re Rosicky, 276 F.2d 656, 47 CCPA 859 (1960) in support of its position is misplaced, appellant says, because there composition claims similar in form to those here were held unpatentable over a group of prior art compounds, including the active ingredients of the claims, which, in contrast to the present case, were disclosed to have the very same specific pharmaceutical utility as did the active compounds of the claimed compositions. It was in those circumstances the court held that the mere formulation of pharmaceutical compositions containing certain amounts of the active ingredients of the prior art and a pharmaceutical carrier would be obvious to one of ordinary skill in the art.

We agree with appellant. Snyder's disclosure that the "derivatives" of tryptamine are merely "of interest" because "of the physiological activity of the parent base" is no indication at all that etryptamine itself necessarily has some nebulous "physiological activity" of the parent base (tryptamine) in fact, much less what specific activity that would be. Similarly, Young's disclosure that many widely divergent indoles which can be prepared by his process are useful as "pharmaceutical products" is no clear suggestion that etryptamine itself necessarily has such utility, whatever that may be.5 In our view, absent a disclosure by Young or Snyder of specific therapeutic or pharmaceutical uses for etryptamine, the addition of a pharmaceutical carrier to that compound and the determination of suitable unit dosage forms is not obvious. We do not think it is reasonable to assume, as the Patent Office seemingly has, that researches would as a matter of course incorporate chemical compounds in specific amounts into pharmaceutically acceptable carriers and dosage unit forms unless they had some reasonably specific pharmaceutical use in mind. The recitation in the claims of certain amounts of active ingredient in combination with the carrier provides some further measure of distinction over the art, inasmuch as the references do not suggest the use of any particular amounts of etryptamine. Cf. In re Wiggins, 397 F.2d 356, 55 CCPA 1356 (1968).

The rejection of claims 1-6 under § 103 is reversed.

This issue — which relates in general to the safety and concomitant usefulness of appellant's compositions and process in treatment of mental depression in humans — appears to be one of first impression. The following background information will facilitate an understanding of our resolution of that issue.

Appellant's present specification sets forth the usefulness of his compositions as follows:

In extensive clinical studies on compositions containing a representative α-ethyltryptamine salt, both its clinical effectiveness and safety have been demonstrated in the treatment of mental depressions of the endogenous, organic, involutional and reactive types, as well as in undefined psychosomatic disorders characterized by a depressive phase. Significant success has also been obtained in treating angina pectoris, rheumatoid arthritis and other conditions.6

In the clinical investigations conducted with α-ethyltryptamine acetate no evidence of liver toxicity has been observed, in contradistinction to experience with certain of the hydrazine compounds. An extremely low incidence of agranulocytosis has been as- sociated with its use, but investigators have reported its safety generally to be one of its outstanding characteristics. Of particular importance clinically is the rapid reversibility of activity, effects being dissipated in 24-48 hours after cessation of therapy. This factor, coupled with the early onset of the desired psychic energization or mood enhancement which follows initiation of therapy, provides a high degree of positive control. Following is a summary of results obtained in the treatment of some of the clinical conditions in which the present compositions have proved significantly effective:

Clinical        Investigators    Number of     Percent
Condition         Reporting      Patients      Benefit

Endogenous
  depression         21            141           82%

Reactive
  depression         12             47           74%

Unclassified
  depressions        20            207           66%

*      *      *      *      *      *      *      *

                                 [Emphasis supplied.]

As corroborating evidence of the assertions of usefulness in his 1960 parent application, appellant submitted the affidavit of a Dr. Anglin7 on February 14, 1961, apparently in an attempt to convince the examiner that his compositions and method were "useful" in compliance with 35 U.S.C. § 101. Anglin discussed the clinical experience of various investigators in 1960 and 1961 with "Monase," a form of the compositions claimed by appellant. At that time, Anglin averred in pertinent part (all emphasis supplied):

The term "Monase" refers herein to tablet compositions containing 3, 5, 10, 15 or 25 mg. of α-ethyltryptamine acetate (generic designation, etryptamine acetate).

Because of the properties recognized in Monase based on laboratory studies the participants in the clinical evaluation program were selected to include psychiatrists, internists, dermatologists, pediatricians and general practitioners in order that the actions of Monase could be observed from various viewpoints and in a number of psychological and clinical entities.

A number of studies were conducted on Monase in which control groups on placebo medication were observed concomitantly in order that the results attributable to Monase could be isolated from environmental or suggestive factors.

Prior to September 12, 1960, 72 independent clinical investigators (all being physicians and none being in the employ of The Upjohn Company) have submitted reports to me concerning their experiences in treating a total of 1172 patients with Monase.

Human tolerance studies were conducted by 3 clinical investigators on a total of 60 human volunteers for periods up to three months, said volunteers being given daily amounts up to 300 mg. (ten-day periods at this dose without serious side effects in any subject and without any side effects necessitating withdrawal of any subjects from the studies. [Paren. unclosed.]

[There follow the favorable comments of the latter 3 investigators with respect to their experience with "Monase."]

* * * * * *

Results of the use of Monase in therapy as reported to me by the participating clinical investigators are accurately summarized as of September 12, 1960 in the following table:

                                            No. of       Total      Percent
Diagnostic                              Investigators  Patients    Patients
 Category                                              Treated     Benefited

Endogenous depression                          21        141        82%
Reactive depressions                           12         47        74%
Schizophrenic disorders                        12         45        33%
Organic depressions                            12        114        50%
Unclassified depressions                       20        207        66%
Psychosomatic disorders                        16        214        60%
Character and behavior
  disorders                                     8         67        66%
Menopausal and involutional
  depressions                                   7         16        56%
[The remainder of the table reports results in treating conditions not now
  relied on, fn. 6, supra.]

    *      *      *      *      *      *      *      *      *      *      *

A total of 112 side effects were reported in the treatment of 1172 cases with Monase, an incidence of approximately 9.5%, such side effects being nonserious in nature and including only 11 cases of blood pressure alteration (of which 9 were mild orthostatic hypotension and 2 were hypertension), with no evidence of liver toxicity. [There follow excerpts from reports accompanying the clinical data summarized above and received by Dr. Anglin from some of the 72 investigators participating in the clinical evaluation of "Monase." The investigators, in general, commented favorably on both the effectiveness of "Monase" against depression in patients and the minimal side-effect rate.]

* * * * * *

The number of patients who are now [February 1961] receiving or have received Monase for therapeutic purposes is approximately 5000.

Subsequent to the compilation of data summarized in the table above, I have received numerous additional reports of extensions of already reported studies and other studies previously unreported, there being no substantial change in the indicated effectiveness of Monase in the clinical categories of the said foregoing table or in the incidence or severity of side effects hereinbefore noted. [Emphasis supplied.]

[There follow excerpts from clinical reports received subsequent to the compilation of data summarized in the table above, again reporting favorably as to effectiveness and low incidence of side effects with use of "Monase."]

* * * * * *

It is my opinion, based on the hereinbefore stated facts and on discussions with clinical investigators participating in the evaluation program, that Monase is a safe and effective agent for the clinical treatment of a variety of depressive states * * *. (Emphasis supplied.)

Subsequently, it appears the examiner withdrew his rejection of the claims for lack of usefulness under 35 U.S.C. § 101. Sometime in the middle of 1961, the Upjohn Company, appellant's assignee, received approval from the Food and Drug Administration (FDA) of its New Drug Application to introduce "Monase" on prescription as a safe antidepressant drug, and its application became "effective." Presumably, Upjohn had complied with 21 U.S.C. § 355(a), (b), and (d) (1958) then in effect, and had satisfied the FDA, inter alia, that sufficiently full reports of investigations had been submitted to establish that the drug was safe for use under the conditions prescribed or suggested in the proposed labeling thereof. Some nine months after the introduction of "Monase," Upjohn reported to the FDA its suspicions that "Monase" may have been implicated in a small number of cases of agranulocytosis8 found among many thousands of patients who had been receiving it, and requested suspension of its then effective New Drug Application covering "Monase" pending evaluation of the problem. The FDA, per a "Suspension Order" signed by the Commissioner of Food and Drugs, ordered suspension of Upjohn's New Drug Application, effective April 9, 1962, in language sufficiently important to merit quotation in full:

The Upjohn Company, Kalamazoo, Michigan, the applicant for and the holder of effective New Drug Application No. 12-632 applying to Coated Compressed Tablets "Monase", having requested the suspension of the effectiveness of said application, on the ground that clinical experience shows that the drug is unsafe for use under the conditions of use upon the basis of which the said application became effective, and thereby having waived Notice of Hearing as provided by Section 505(e) of the Federal Food, Drug, and Cosmetic Act, prior to such suspension;

The Commissioner of Food and Drugs, by virtue of the authority vested in the Secretary by the provisions of the Federal Food, Drug, and Cosmetic Act [Section 505(c); 52 Stat. 1052; 21 U.S.C. 355(c)] and delegated to the Commissioner by the Secretary (20 FR 1996) finds that clinical experience shows that Coated Compressed Tablets "Monase", are unsafe for use under the conditions of use upon the basis of which the application became effective;

WHEREFORE, on the foregoing finding of fact and the request of the applicant, the effectiveness of New Drug Application No. 12-632 applying to Coated Compressed Tablets "Monase", is suspended, effective April 9th, 1962. [Emphasis supplied.]

As a consequence of that order, Upjohn removed "Monase" from the prescription drug market and, insofar as we are informed, it has remained off the market to the present time.

Faced with that set of facts, the examiner reinstated his rejection of appellant's claims for lack of usefulness under 35 U.S.C. § 101. He did not challenge appellant's proofs as to the "effectiveness" or "operativeness" of the claimed compositions for treating mental depression, but did hold that appellant had failed to prove the compositions are "safe in treating human beings." As evidence of that, the examiner placed in the record newspaper articles from the March 21, 1962 edition of the New York Times9 and the April 16, 1962 edition of The Washington Daily News, reporting withdrawal of "Monase" from the market and reasons therefor.

Appellant then submitted the second affidavit (1965) of Dr. Anglin, heretofore mentioned. Anglin averred:

In my opinion, Monase can still be classified medically as a safe and effective drug.

It is true that there has been a serious toxic reaction associated with the use of this drug since the date of my original affidavit, namely agranulocytosis. However, in all such cases reported to or known by The Upjohn Company (twelve in number, or an estimated probability rate of one case out of each 35,000 patients who used the drug), Monase was not the only drug employed in the treatment, nor were the patients suffering only from a depressed state. It is not at all certain that Monase alone was the causative agent for this reaction.

There has been some research done to determine whether Monase can cause this reaction, and although the work is not yet complete enough to exonerate Monase, the results thus far are negative.

It is also true that the drug has been withdrawn from the market as a direct result of this reported reaction. However, the issues involved in withdrawal naturally transcend the simple virtue and hazard of the drug itself. Likewise, the attitude of the Food and Drug Administration with respect to marketing the drug is relative to such facts as the manner and the purpose for which the drug is marketed. For example, the attitude could be different if the drug were recommended only for severe depressions and suitable warnings were used to alert the medical profession of the possibility of agranulocytosis. [Emphasis supplied.]

In fact, a physician, properly informed about the properties of a drug and the probability of harm which may result from its use, must always weigh the probability that a given patient will be benefited by its use against the probability that he will be harmed.

There is some danger in the use of all potent drugs and agranulocytosis is one type of serious disorder that has been associated with the use of several currently marketed drugs, including Tofranil, one of the most widely used anti-depressants. The following statement has appeared in the package insert accompanying this product:

Bone marrow depression, including agranulocytosis has been associated with the use of the drug in rare instances. Leukocyte and differential counts should be performed in any patient who develops fever and sore throat during therapy, and the drug should be discontinued if there is evidence of pathological neutrophil depression.

A similar course of action could be followed in the case of Monase and in my own opinion, as well as that of many of my colleagues, would be sufficient to enable a practicing physician to use Monase safely and effectively in many depressed patients. * *

* * * * * *

Thus, Monase has proven extremely useful in clinical practice and would be used if it were available today. Like many of my colleagues in medical practice, I realize that depression is also a serious disease and can be fatal, and that none of the other available methods of therapy are without their own form of hazard.

The examiner was not convinced of the safety, and hence the legal "usefulness," of the claimed compositions and of "Monase" in particular. In his Answer he stated:

All the claims stand rejected as failing to comply with 35 U.S.C. 101, applicant having failed to establish the claimed material is safe in treating human beings. The record is replete (New York Times, Washington Daily News, Am.J. of Psychiatry) with data that clearly demonstrates "Monase" is not safe for its alleged use. Accordingly, it lacks the utility required by 35 U.S.C. 101. [Citing In re Citron, 51 CCPA 852, 325 F.2d 248, 139 U.S.P.Q. (BNA) 516; In re Novak, 49 CCPA 1283, 306 F.2d 924, 134 U.S.P.Q. (BNA) 335; Commonwealth Engineering Co. v. Ladd [D.C.] 199 F. Supp. 51, 131 U.S.P.Q. (BNA) 255 and Isenstead v. Watson [D.C.] 157 F. Supp. 7, 115 U.S.P.Q. (BNA) 408.]

* * * * * *

Utility within the meaning of 35 U.S.C. 103 [sic, § 101 intended] requires that a therapeutic be both safe and effective for its intended use. * * * Appellant has submitted the affidavit of Dr. Anglin, which is conclusionary in nature, * * * in support of the alleged utilities of anti-depressant treatment * * *. These documents seek to establish the effectiveness of Monase, but are not sufficient to establish the safety of this compound. The affidavit of Dr. Anglin even recognizes "that there has been a serious toxic reaction associated with the use of this drug * * *, namely agranulocytosis". * * * There is no evidence of record to date to show that Monase alone is free from the above toxic effect. It is the Examiner's position that where a drug, which has a recognized toxic reaction associated with its use coupled with the fact that the nation's safeguarding agent, the Food and Drug Administration, has banned such drug from the market as being unsafe and to date has not lifted such ban; that such drug is not safe for use within the meaning of 35 U.S.C. 101.

We note that § 101 says nothing about safety. Further, it is not clear to us what evidence would have convinced the examiner that the claimed subject matter was "useful," which is the statutory requirement, save reapproval by the FDA of Upjohn's New Drug Application covering "Monase" for the commercial market as a commercially useful drug and/or evidence that "Monase" does not possess the side effect of agranulocytosis at all, viz. is absolutely safe.

The board appears to have retreated somewhat from the doctrinaire approach taken by the examiner, although in end result the effect was the same, and added some new concepts of its own. It said:

Appellant has responded to the preceding rejection by pointing out that the incidence of agranulocytosis is very small, i. e., the drug is useful in most cases and that various drugs on the market have the same adverse side effect. Such drugs, however, are sold only with restrictive labeling carrying warnings of the side effect. Appellant speculates the "Monase" might also be released with recommendations for use only in severe depressions and with suitable warnings of possible agranulocytosis. Up to the present time no attempt appears to have been made by appellant or his assignee to obtain approval, with such restrictions, from the Commissioner of Food and Drugs consequently this argument cannot be taken seriously considering that some 4½ years have elapsed since the original order of suspension. Nor has appellant brought the record up to date as to what additional serious side effects and fatalities have been observed since the banning order. The statement in the specification, page 2, with reference to "Monase" that an "extremely low incidence of agranulocytosis has been associated with its use, but investigators have reported its safety generally to be one of its outstanding characteristics" is hardly in accord with the present state of facts and cannot be reconciled with assignee's voluntary withdrawal of the drug as "unsafe for use" (see Suspension Order supra).

While approval by the Commissioner of Food and Drugs is not a prerequisite for the patenting of a new drug, the Commissioner of Patents is by statute (21 USC 372, Sect. 702(d) as amended 1962) on a consulting basis with the Secretary of Health, Education and Welfare in respect to questions that may arise in patent applications on drugs. Since the Secretary through the Commissioner of Food and Drugs has ruled "Monase" to be unsafe and as of today still considers the drug unsafe this finding should not be lightly regarded by the Patent Office. It is true that many useful drugs exhibit toxicity or produce a certain incidence of side effects, including agranulocytosis. This alone would not provide a basis for refusal of a patent on such a drug as without utility within the meaning of 35 U.S.C. 101. However, on the basis of the record before us, we feel compelled to sustain the rejection of all claims under this section. This is because of assignee's own admission of unsafeness of the drug as demonstrated in the cited Suspension Order, his failure to bring the record up-to-date on the incidence of toxicity (agranulocytosis), and his failure during the past 4½ years to take any action with respect to securing withdrawal of the Suspension Order by his postulated warning labels and restriction as to use. All of this seems to add up to an abandonment of "Monase" as a useful drug.

In a request for reconsideration under Rule 197(b), appellant took issue with the board's statement that the record was not up-to-date on the incidence of toxicity, pointing out that Dr. Anglin's second affidavit had been filed in November 1965, but 19 days prior to filing of appeal to the board, and that the evidence "was as up-to-date as it could reasonably be expected to be under the Patent Office Rules of Practice." The board responded:

We heard this case September 15, 1966. Obviously the record is not up-to-date insofar as this tribunal is concerned. The reporting of adverse reactions in cases of this kind is a continuing responsibility. It is not improbable that other detrimental effects, besides agranulocytosis, may by now have been revealed. In any case the record is devoid of any report on the results of the additional research undertaken to "determine whether Monase can cause this reaction" (page 9 of the above Anglin affidavit).

We have quoted extensively from those portions of the opinions of the examiner and board which are directed to appellant's efforts to establish the usefulness of his compositions and process.

We now set forth our reasons for concluding that the board erred in failing to hold that the claimed subject matter is "useful" within the meaning of that term in 35 U.S.C. § 101.

Although the patent statutes do not establish "safety" as a criterion for patentability of any of the statutory classes of patentable subject matter mentioned in § 101, yet it is undoubtedly true, as demonstrated by some of the cases cited by the examiner, that the Patent Office and the courts over the years have considered "safety" as an aspect of the broader question of whether certain inventions — pharmaceuticals in particular — are "useful" within the meaning of § 101 and its predecessors.10 No one, we suppose, would seriously maintain that, as a matter of policy, a composition unsafe for use by reason of extreme toxicity to the point of immediate death under all conditions of its sole contemplated use in treating disease of the human organism would nevertheless be useful11 within the meaning of the patent laws.

But at the same time it must be recognized that "safety" is a relative matter, and that absolute proof of complete safety is realistically impossible. As this court pointed out in In re Hartop, supra note 9:

With regard to the * * * nature of "safety" in the field of drugs and medicaments, we take judicial notice that many valued therapeutic substances or materials with desirable physiological properties, when administered to lower animals or humans, entail certain risks or may have undesirable side effects. True it is that such substances would be more useful if they were not dangerous or did not have undesirable side effects, but the fact remains that they are useful, useful to doctors, veterinarians and research workers, useful to patients, both human and lower animal, and so are useful within the meaning of 35 U.S.C. § 101. The use of drugs in medicine is frequently a matter of balancing risks to save a life.

And Congress has given the responsibility to the FDA, not to the Patent Office, to determine in the first instance whether drugs are sufficiently safe for use that they can be introduced in the commercial market, under the conditions prescribed, recommended, or suggested in the proposed labeling thereof, as the majority of this court also noted in Hartop:

However, regardless of the issuance of the patent under the circumstances of the case at bar, there is no question but that the public must be protected absolutely against the advertising and sale and other distribution of harmful drugs, medicines and the like in all situations, including this one if such be the case. We believe that Congress has recognized this problem and has clearly expressed its intent to give statutory authority and responsibility in this area to Federal agencies different than that given to the Patent Office. This is so because the standards established by statute for the advertisement, use, sale or distribution of drugs are quite different than the requirements under the Patent Act for the issuance of a patent. For example, the Federal Trade Commission has been given the reponsibility of enforcing the Wheeler-Lea amendments to the Federal Trade Commission Act. Also, the Food and Drug Administration has been given the responsibility of enforcing the Federal Food, Drug, and Cosmetic Act.

The board, if not the examiner, seems to have been at least implicitly cognizant of the applicability of some of those principles to the factual situation here. For example, the board recognized, correctly we think, that approval by the FDA "is not a prerequisite" for the patenting of a new drug (and whether the drug here is "useful" is the only pre-requisite to patentability with which we are here concerned). To put it another way, the FDA need not necessarily determine that a drug is commercially useful or usable before it may be "useful" in the patent law sense. The board also correctly recognized that the fact that many "useful" drugs exhibit some degree of toxicity or side effects "would not provide a basis for refusal of a patent on such drug as without utility" under § 101. The presence of a certain degree of danger or risk attendant on the use of a drug does not necessarily mean that the subject matter is not useful within the meaning of the patent law because of that danger or risk.12

Yet the reasons advanced by the board in support of its refusal to find that appellant's compositions and process are useful within the meaning of § 101 seem to us to be basically at odds with its reasoning expressed above, and other wise singularly lacking in persuasive force. As one reason, the board seemed to feel that the fact that appellant's assignee had taken no action over a period of 4½ years to secure withdrawal of the FDA Suspension Order relating to its New Drug Application covering "Monase" (which it requested itself) had some bearing on the patentability of the present subject matter. If, as the board says, approval by the FDA is not a necessity to patenting of the new drug composition in the first place, of what material or relevant significance is that inaction unless, in final analysis, the board would indeed require commercial marketing, or at least approval therefor by the FDA, before authorizing a patent to issue? But certainly "commercial usefulness," i.e. progress in the development of a product to the extent that it is presently commercially salable in the market place, has never been a prerequisite for a reduction to practice and the subsequent patentability of any of the classes of patentable subject matter set forth in § 101, much less the particular class of compositions of matter called drugs. See Hildreth v. Mastoras, 257 U.S. 27, 34, 42 S. Ct. 20, 66 L. Ed. 112 (1921); The Telephone Cases (Dolbear v. American Bell Tel. Co.), 126 U.S. 1, 535, 8 S. Ct. 778, 31 L. Ed. 863 (1887); Potter v. Tone, 36 App.D.C. 181, 184-185 (1911); Creamer v. Kirkwood, 305 F.2d 486, 50 CCPA 715 (1962); Tansel v. Higonnet, 215 F.2d 457, 42 CCPA 732 (1954); Van Cleef v. Tierney, 118 F.2d 911, 28 CCPA 1039 (1941); Leichsenring v. Freeman, 103 F.2d 378, 26 CCPA 1153 (1939).

In the same vein, the solicitor urges that appellant is, in effect, asking this court to authorize the grant of a patent "prior to the successful conclusion of the search" for usefulness of the claimed compositions and process, and that appellant is predicating his need for a patent on the incentive it would give for further research. The solicitor draws our attention to Brenner v. Manson, supra, where the Court stated, 383 U.S. 536, 86 S. Ct. 1042:

But a patent is not a hunting license. It is not a reward for the search, but compensation for its successful conclusion.

and asks:

Should the appellant be rewarded for his partial, incomplete development, which is of questionable benefit to the public?

To the contrary, we think appellant's quest for a chemical composition which is useful has been successful. In contrast to the situation in Brenner v. Manson, where no specific use or useful property was disclosed for the claimed compounds, here a useful property of etryptamine has been discovered in animal tests, compositions containing it have been subjected to extensive clinical trials in humans, and those compositions have even been commercially marketed. The evidence of record incontrovertably establishes that appellant's compositions are effective in treating various types of mental depressions in humans. And the Anglin affidavit is also sufficient to establish, we think, that the compositions have been, and can be, administered safely (though perhaps not with absolute safety) to human patients by qualified, knowledgeable medical experts.13 The fact that compositions containing etryptamine, as demonstrated by the data in the second Anglin affidavit, have been administered to over 400,000 patients14 with little or no reported or apparent serious ill effect in each, other than the 12 reported cases of agranulocytosis, is telling evidence of the practical safety and consequent usefulness of the compositions. That evidence of successful use has not been controverted either, but rather has seemingly been ignored. It is, as appellant points out, as if the Patent Office views the evidence of 12 possible cases of a serious side effect (a rate of 1 case for each 35,000 patients treated, an incidence of 0.003%) as "wiping out" the benefit to many which "Monase" has contributed. That incidence of side effect, in our opinion, does not lead to that result.

That further research may be necessary before the claimed compositions are once again marketed on a commercial scale is not really material to whether those compositions are now useful, nor is it fatal to appellant's case. See Land v. Regan, 342 F.2d 92, 52 CCPA 1048 (1965). As appellant points out,15 one of the fundamental purposes of the patent system, as recognized by the recent Report of the President's Commission on the Patent System, is to stimulate, in the Commission's words, "the investment of additional capital needed for the further development and marketing of the invention." To deny appellant his patent grant because further research and development may be necessary before marketing may again take place would effectively defeat that objective of the patent system.

As a second reason, the board observed that appellant had not, as of the time of hearing (September 1966), brought the record up to date as to what additional cases of side effects, particularly agranulocytosis, and fatalities had been observed since the FDA Suspension Order of April 1962, and that it viewed the reporting of such reactions as "a continuing responsibility." Appellant questions the procedural due process aspect of the latter requirement inasmuch as there is no provision in the statute or Patent Office Rules of Practice relating to it. Wholly aside from that contention, we think the board overlooked the fact that "Monase" had been withdrawn from the market in April 1962 or shortly thereafter, more than three years prior to the October 27, 1965 execution date of the second Anglin affidavit which reported the known incidence of agranulocytosis to that time as 12 cases. In neither of its decisions has the board questioned the completeness of the Anglin affidavit as of its execution date. Nor has it given us cause to think or assume that there may have been significantly — indeed, any — more cases of side effects than those Anglin reported in a product that had been removed from the commercial market and unavailable for use since about April 1962 and particularly since October 1965, or to believe that appellant has not carried out whatever responsibility16 he may have in the present regard.

The third reason advanced by the board seems to us to lie at the heart of the matter. As evidence of the supposed lack of usefulness of the claimed subject matter, the board relies on Upjohn's "voluntary withdrawal of the drug as unsafe `for use'," the latter's "own admission of unsafeness of the drug as demonstrated in the cited Suspension Order," as well as the Suspension Order itself which, in the board's view, demonstrates that the FDA "has ruled `Monase' to be unsafe and as of today still considers the drug unsafe."

In view of 21 U.S.C. § 372(d),17 it is no doubt true that an unequivocal finding by the FDA that a drug is totally unsafe in all circumstances of contemplated use should not be lightly regarded by the Patent Office as an aid in its determination of whether a drug is useful under 35 U.S.C. § 101. But what has the FDA found here? In concluding that the FDA has ruled "Monase" to be "unsafe," without further qualification, we think the board has painted with too broad a brush, and has drawn inferences from the Suspension Order that are not justified by its specific language. The order does not contain any broad, pervasive finding, nor has Upjohn in any way "admitted," that "Monase" is completely and absolutely unsafe under all conditions of use, i. e., that "Monase" is medically "useless." What it does say, and what we understand appellant to concede here, is that under the conditions of use upon the basis of which the application became "effective," "Monase" is unsafe for use to a degree justifying its withdrawal from the market and suspension of the effectiveness of the New Drug Application.

And what are those conditions of use upon which Upjohn's original New Drug Application became effective? The Anglin affidavit and appellant tell us, and the Patent Office has not disagreed, that those conditions included, among others, a lack of warning attached to the label or package insert that "Monase" may produce agranulocytosis or at least has been associated with such a toxic effect, a condition which seems to relate more to the manner of marketing etryptamine than to its ultimate worth. We agree with the board that we should not speculate whether Upjohn can ever market "Monase" again with its particular postulated warning labels and restrictions, for it is unnecessary to do so. It is sufficient, we think, that the record fails to show that the FDA has ruled that "Monase" cannot be used with reasonable safety as a practical matter. The record shows that it can. In view of the limited and specific language of the finding contained therein, the Suspension Order, in our view, is not sufficient to overcome the expert testimony of Anglin, who concluded that etryptamine has been and could still be used safely by a practicing physician in spite of the possible, very low incidence of side effect that may be associated with it, so long as the physician has knowledge of that possible side effect.

We conclude that appellant's evidence is sufficient to establish that etryptamine is "useful."18 The rejection of claims 1-12 under § 101 is reversed.

The rejection of claims 11 and 12 under § 103 is affirmed. The rejections of claims 1-6 under § 103 and of claims 1-12 under § 101 are reversed.

Modified.

CHARLES F. McLAUGHLIN, J., dissents.

HOLTZOFF, J., participated in the hearing of this case but died before a decision was reached.