Appeal No. 2000-0920 Application No. 08/829,034 and dominance. In re Hammack, 427 F.2d 1378, 1382, 166 USPQ 204, 208 (CCPA 1970). If the scope of the invention sought to be patented cannot be determined from the language of the claims with a reasonable degree of certainty, a rejection of the claims under 35 U.S.C. § 112, second paragraph, is appropriate. In re Venezia, 530 F.2d 956, 958, 189 USPQ 149, 151 (CCPA 1976). In the present case, while claims 11-18 require that the implant be fabricated from an FDA approved cermet, the underlying specification offers no guidance whatsoever as to precisely what constitutes an FDA approved cermet. While it might perhaps be possible to consult a list compiled by the United States Food and Drug Administration, if such a listing exists, as to what cermets are or are not approved for use as an implant material at any given time, it is reasonable to assume that said list would be subject to change over time, as when approval is granted (or withdrawn) upon further consideration by the FDA. Furthermore, while it may be argued that the terminology in question is with reference to those cermets that appear on an FDA approved list as of a particular date,5 there is no indication in the record before us of what that date may be. In light of these 5For example, the filing date of the application. 15Page: Previous 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NextLast modified: November 3, 2007