¶1This appeal is from the decision of the Patent Office Board of Appeals affirming the rejection of claim 30 in appellants’ application serial No. 329,212, filed December 9,1963, for a cephalosporin-type antibiotic known as cephaloridine. No claim has been allowed. We reverse.
¶2The Subject Matter Claimed
¶3The appealed claim is drawn to a single compound, by structural formula, and reads:
¶430. A compound of the formula
¶5[[Image here]]
¶6This compound is said to be a broad spectrum antibiotic, effective against both gram-positive and gram-negative micro-organisms, and to possess many other virtues not relevant here because of the nature of the rejection.
¶8Appellants’ claim has been rejected as anticipated by U.S. patent No. 3,218,318, issued to Edwin H. Flynn November 16, 1965, on an application filed in the United States August 31, 1962, and available against appellants’ application by virtue of 35 USC 102 (e) as of its filing date. This reference discloses genetically a class of cephalosporin-type compounds having the following structural formula:
¶9[[Image here]]
¶10in which R1, taken alone, is —OH, Ci-C8 acyloxy, or tertiary-amino,, R2 is —OH when R1 is —OH, R2 is —OH when R1 is.Ci-C8 acyloxy, R2 is —O- when R1 is tertiary-amino, R1 and R2, when .taken together, are —O—, n is zero or 1, R3 is Ci-C6 alkylene, and R4 is a hetferomono-cyclic radical containing O, S, and/or N. Appellants “conservatively” estimate that over 230,000 compounds (including, concededly, theirs) are embraced within this generic disclosure, and the board in turn conceded that, “If this were the only anticipatory disclosure in the reference,” the disclosure would be “too diffuse” to support a 102 rejection.
¶11However, the board found: (1) that Flynn’s examples 4 and 10 “adequately disclose the exact precursors of the presently claimed compound”; (2) that Flynn’s statement that
Cephalosporin C is also readily converted into compounds of the cephalosporin Ca type by refluxing in aqueous solution with an excess of pyridine, for example, as described in Belgian Patent 693,777.
¶12was adequate to teach how to convert the C-type precursors disclosed in examples 4 and 10 to the CA-type compound claimed by appellants; and (3) that Flynn’s statement that, “in general, those .compounds which possess the cepholosporin C nucleus are more effective anti-bacterially than those containing the cephalosporin G nucleus” provided the “motive … to follow this additional teaching … Putting these three findings together, the board held that
*807The indicated combination of Example 4 or 10 with … [the teaching of how to convert “Cephalosporin C … into compounds of the cephalosporin Ca tjrpe”] is not a matter of obviousness within the meaning of 35 U.S.C. 103 but of direct teaching within the four corners of the patent.
¶13The effect of this holding, of course, was that the board did not have to look at the extensive objective evidence which appellants had offered to rebut any inference of obviousness which might be thought to arise from the teachings of the Flynn patent.
¶14Opinion
¶15The sole issue in this case is whether cephaloridine is “described" in the Flynn patent within the meaning of that word in 35 USC 102(e).
¶16In this case we have no difficulty in deciding that the portions of the Flynn reference relied upon by the Patent Office do not identically' describe the claimed subject matter. As appellants point out, the compounds of Flynn’s examples 4 and 10 are the “exact precursors” of' appellants’ compound “only to the extent that appellants have discovered that cephaloridine will be formed if the acid [disclosed in example 10] is first selected and then carefully reacted with a particular tertiary amine which also must be selected.” (Emphasis in original) . Of course, it does appear that the “particular tertiary amine” to which appellants refer is pyridine, which is mentioned elsewhere in *808Flynn as an example of the class of reactants
¶17The board, apparently recognizing the weakness of its position in attempting to arrive at an anticipation by combining the disclosures in examples 4 and 10 with the above-quoted teaching elsewhere in the patent of how to convert a particular, different cephalosporin O-type compound into cephalosporin CA-type compounds, postulates certain teachings which might have been in the reference patent any one of which, according to it, if present would have removed all doubt concerning the completeness of the anticipation.
¶18Although the board declined to discuss four relatively recent decisions by this court in cases involving description requirements in various sections of the patent statute
¶19Accordingly, we will not sustain the rejection on the ground on which it was made. Concerning the rejection as it is reformulated by the dissent, we express no opinion. It may be that the Patent Office should have relied upon the portions of Flynn on which the dissent relies, or it may be that they had very good reasons for not doing so. In any event, they did not rely on those teachings in Flynn, and appellants have therefore had no opportunity to comment thereon. We do not conceive that it is part of our duty to make better rejections for the Patent Office, even if we could be sure that we really were making a “better rejection,” nor do we think that it would be consistent with the requirements of due process for us to do so for.the first time on appeal, without notice to the affected party.
¶20*810Furthermore, we point out that we are not granting appellants a patent, if that is what the dissent means by “bestowing on the applicants a license to litigate.” We are simply reversing a rejection on the ground that the claim on appeal is anticipated under § 102 by Flynn. It may well be that it is unpatentable because obvious under § 103 in view of Flynn, but no such rejection is before us. The Patent Office is free to make such a rejection after our decision in this case should it think it appropriate. In re Ruschig, 54 CCPA 1551, 379 F. 2d 990, 154 USPQ 118 (1967); and In re Fisher, 58 CCPA 1419, 448 F. 2d 1406, 171 USPQ 292 (1971). In any event, it is the Patent Office which grants patents, not this court. It may further be observed that it is not now the practice in this court, if it ever was, to apply a different standard in cases which are in “complex areas of technology” than we do in easily understood cases.
¶21The decision of the board is reversed.
¶22At one time appellants contended that Flynn was not an “enabling disclosure/’ In re LeGrice, 49 CCPA 1124, 301 F. 2d 929, 133 USPQ 365 (1962), but we gather that they have abandoned that contention on appeal, although there is still an ambiguous reference to LeGrice in their briefs.
¶23 Tlie parties argue, in essence, about whether the words “for example” in the sentence “Cephalosperin C is also readily converted into compounds of the cephalosporin Ca type by refluxing in aqueous solution with an excess of pyridine, for example, as described in Belgian Patent 593,777” refers to the word “pyridine” or the words “ais described.” Appellants argue that “it is to be stressed that pyridine is only being suggested as an example of the tertiary amine[s] suitable for the reaction with the prior art compound eephadosporin C,” while the solicitor seems to be taking the position that Flynn’s specification would be read as indicating that the Belgian patent was one place among many where those skilled in the art could learn how to react cephalosporin C with pyridine. While the matter is not free from doubt, we think it more likely that the sentence would be read in the former way because the presence of the word “type” after “Ca” and not after “C” suggests that one particular C-type compound (namely, cephalosporin C itself) can be changed into various CA-type compounds by refluxing it with an excess of the proper reactant. This interpretation of the controverted sentence is reinforced by the next sentence in Flynn’s specification, which is as follows :
The reaction is applicable in general to the tertiary amines, of which numerous examples are given above, yielding corresponding derivatives of the cephalosporin Ca type wherein the tertiary amine is attached to the methyl group in the 3 position of the thiazine ring, and forms an inner salt with the carboxyl group in the 4 position. ■
¶24 These postulations were contained in the following passage from the board’s opinion :
There would be no doubt of the completeness of the anticipation if,. paraphrasing column 3, lines 47 to 00, the following language were present at the end of each of Examples 4 and 10 :
“This compound is also readily converted into a compound of the cephalosporin CA type by refluxing in aqueous solution with an excess of pyridine, for example, as described in Belgian Patent 593,777.”
¶25Likewise, there would be no question of the applicability of column 3, lines 47 to 50, if that sentence were introduced by the words “Any one of the compounds of Examples 1 to 15 is also readily converted into compounds of the CA type …” or “Any one of the herein specifically named cephalosporin C compounds is also readily converted into compounds of the CA type …”
¶26 In re Ruschig, 52 CCPA 1238, 343 F. 2d 965, 145 USPQ 274 (1965); In re Kalm, 54 CCPA 1466, 378 F. 2d 959, 154 USPQ 10 (1967); In re McLamore, 54 CCPA 1544, 379 F. 2d 985, 154 USPQ 114 (1967); and In re Ruschig, 54 CCPA 1551, 379 F. 2d 990, 154 USPQ 118 (1967) (Ruschig II).
¶27 Among the most recent of these are In re Ahlbrecht, 58 CCPA 848, 435 F. 908, 911, 168 USPQ 293, 296 (1971); In re Lukach, 58 CCPA 1233, 442 F. 2d 967, 969, 169 USPQ 795, 796 (1971); and Fields v. Conover, 58 CCPA 1366, 443 F. 2d 1386, 1391-92, 170 USPQ 276, 279-80 (1971).