This is an appeal from the decision of the U.S. Patent and Trademark Office (“PTO”) Board of Appeals (“board”) sustaining the *532 final rejection of appellant’s claims 1 1, 2, 5, 6, 7, 25, and 28. We affirm.
BACKGROUND
The subject matter of this appeal was previously before this court’s predecessor in
In re Donohue,
The present invention relates to 2,2',6,6'-tetramethylbiphenyl-4,4'-dicarboxylic acid compounds which are suitable for producing polymers used to form shaped objects, such as film, fibers, or molded parts. Claim 1, which is the sole independent claim on appeal, is illustrative:
2,2',6,6'-tetramethylbiphenyl-4,4'-dicar-boxylic acid compound comprising said acid, an acyl halide derivative thereof, or a simple ester thereof.
The PTO has rejected all the appealed claims under 35 U.S.C. § 102(b) “as anticipated by Nomura [et al.], optionally in view of Lincoln and Walker [et al.].”
Nomura et al. (“Nomura”) 3 discloses twelve 2,2',6,6'-tetramethylbiphenyls (“TMBP”) which are 4,4'-disubstituted with NH2, NMe2, OH, OMe, Cl, Br, I, C02H, C02Me, CN, N02, or H substituents. Methods of preparing all these compounds, except those disubstituted with C02H or C02Me, are set forth in Nomura. Nomu-ra’s disclosure of how to make 4,4'-dinitrile (or dicyano) TMBP is particularly significant, because Lincoln 4 and Wagner et al. (“Wagner”) 5 teach, generally, the preparation of carboxylic acids from nitriles by hydrolysis.
In
Donohue I,
a majority of the Court of Customs and Patent Appeals (“CCPA”) affirmed the PTO’s rejection of appealed claims 1, 5, 6, and 7
6
under 35 U.S.C. § 102(b).
Id.
at 127,
A minority of the CCPA voted to reverse the PTO’s decision, because they concluded it was uncertain from the text of Nomura that the dicarboxylic acid TMBP and dime-thyl ester TMBP were ever prepared.
Id.
at 129,
After Donohue I, the presently-appealed application was filed. During prosecution before the PTO, appellant submitted an affidavit under 37 C.F.R. § 1.132 executed by Dr. Ellis K. Fields (“Fields affidavit”). In this affidavit, Dr. Fields states that he wrote to Dr. Yoshito Takeuchi, one of the authors of Nomura, to ask whether the disclosed dicarboxylic acid TMBP or dime-thyl ester TMBP compounds were ever synthesized, as indicated in Nomura. Dr. Tak-euchi responded by stating that these compounds were not synthesized, and Dr. *533 Fields submitted his affidavit to that effect.
Despite the Fields affidavit, the examiner finally rejected the claims, and an appeal to the board was filed. The board affirmed the rejection of the claims on the grounds stated supra, holding that it was bound by Donohue I. As to the Fields affidavit, the board held that whether the authors of Nomura actually prepared the claimed compounds is not “material or relevant”; rather, the key factor in evaluating the adequacy of a reference’s disclosure was deemed to be whether that disclosure would have been enabling, and the board determined that the CCPA had decided that question with respect to Nomura.
ANALYSIS
Appellant has made a record different from that in
Donohue I
by submitting the Fields affidavit. This new record presents a new issue of patentability with respect to whether the previously-sustained anticipation rejection can still be maintained. In view of this new issue, the PTO properly declined to make a formal
res judicata
rejection and addressed the question of whether the Fields affidavit overcomes the rejection of the claims based on Nomura.
See In re Ackermann,
Appellant argues that the Fields affidavit, which states that the authors of Nomura did not make the disclosed dicarboxylic acid TMBP and dimethyl ester TMBP compounds, overcomes the PTO’s rejection. It is urged that
Donohue I
and
In re Samour,
It is well settled that prior art under 35 U.S.C. § 102(v) must sufficiently describe the claimed invention to have placed the public in possession of it.
7
In re Sasse,
In re Wiggins,
Although In re Samour and Donohue I mention that the claimed invention in each case was apparently produced in conjunction with the anticipatory reference, this is a far cry from proclaiming that such pro *534 duction is required to meet the enablement requirement. In re Samour, in fact, states:
[W]hether or not [the claimed invention] has been made previously is not essential to a determination that a method of preparing it would have been known by, or would have been obvious to, one of ordinary skill in the art.
At oral argument, appellant also challenged the correctness of the CCPA’s holding in
In re Samour
and
Donohue I
that several references can be used together to support an anticipation rejection. However, we are bound by the CCPA’s decision in those cases.
South Corp. v. United States,
It is elementary that an anticipation rejection requires a showing that each limitation of a claim must be found in a single reference, practice, or device.
E.g., Kalman v. Kimberly-Clark Corp.,
Appellant also argues that the references fail to teach the solubility characteristics and melting point range set forth in dependent claims 25 and 28, respectively.
9
However, where, as here, the dicarboxylic acid TMBP and dimethyl ester TMBP of Nomura are identical to the claimed invention, the properties of Nomura’s compounds are inherently the same as those of the claimed invention in the absence of proof to the contrary.
See In re Best,
In view of the foregoing, the board’s decision is affirmed.
AFFIRMED
Notes
. In application Serial No. 263,900, filed May 15, 1981, for Tetramethylbiphenylcarboxylic Acids and Derivatives Thereof, which is a division of Serial No. 60,909, filed July 26, 1979, and a continuation of Serial No. 622,649, filed October 15, 1975, which is a continuation-in-part of Serial No. 517,506, filed October 24, 1974.
. Donohue I involved application No. 622,649. See note 1, supra.
. Yujiro Nomura and Yoshito Takeuchi, “Substi-tuent Effects in Aromatic Proton Nuclear Magnetic Resonance Spectra. Part VI. [ 2 H(j] Benzene-induced Solvent Shifts in 4,4'-Disubstituted 2,2',6,6'-Tetramethylbiphenyls and Related Compounds," J. Chem. Soc'y (B), 956-60 (1970).
. U.S. Patent No. 3,876,691, issued April 8, 1975, on application No. 351,696, filed April 16, 1973, for a “Process for the Hydrolysis of Nitriles."
. Wagner et al., Synthetic Organic Chemistry 412-15 (John Wiley & Sons, N.Y., N.Y.) (1965).
. Claim 1 in Donohue I differs from claim 1 of the present appeal only in that the latter includes the limitation "comprising said acid, an acyl halide derivative thereof, or a simple ester thereof.” Claims 5, 6, and 7 of Donohue I specify the same dependent features as in the presently-appealed claims of the same number.
. This rule is based on the “described in a printed publication” language in 35 U.S.C. § 102(b). See
In re LeGrice,
.
Compare Studiengesellschaft Kohle, M.B.H. v. Dart Industries, Inc.,
. Claims 25 and 28 read as follows:
25. The acid of Claim 2, said acid being soluble in ether and N-methyl-2-pyrrolidone.
28. The dimethyl ester of Claim 7, having a melting point of 128-129°C.
