Appeal 2006-2522 Application 10/279,632 Appellants separately argue claims 4 and 7 which recite ranges for the amount of one of the catalysts and the second catalyst, respectively. However, we agree with the Examiner that it would have been a matter of prima facie obviousness for one of ordinary skill in the art to determine the optimum amount for each catalyst. In re Boesch, 617 F.2d 272, 276, 205 USPQ 215, 219 (CCPA 1980). Also, Appellants have not refuted the Examiner’s factual finding that “it is well known in the art that the efficiency of oxidant reduction in the cathode is determined by the amounts of platinum black (carbon supported platinum) in the electrode. See Mazzucchelli et al. (U.S. 7[sic,6],737,183 B1); Column 1, Lines 48-67” (Answer 7, third paragraph). In conclusion, based on the foregoing and the reasons well-stated by the Examiner, the Examiner’s decision rejecting the appealed claims is affirmed. No time period for taking any subsequent action in connection with this appeal may be extended under 37 CFR § 1.136(a)(1)(iv) (2004). AFFIRMED clj Fish & Richardson P.C. P.O. Box 1022 Minneapolis, MN 55440-1022 5Page: Previous 1 2 3 4 5Last modified: November 3, 2007