Appeal No. 95-0996 Application 07/943,025 ‘410, for the reasons stated above. A lesser burden of proof is needed to make out a prima facie case of obviousness in product-by-process claims than in conventional product claims. See In re Fessman, 489 F.2d 742, 744, 180 USPQ 324, 326 (CCPA 1974). Once it is shown that the claimed product reasonably appears to be the same or substantially similar to the product of the prior art, the burden shifts to appellants to establish, through objective evidence, an unobvious difference between the claimed and prior art product. See In re Best, 562 F.2d 1252, 1255-56, 195 USPQ 430, 433-34 (CCPA 1977); Ex parte Phillips, 28 USPQ2d 1302, 1303 (Bd. Pat. App. & Int. 1993). The Kersting Declaration dated Dec. 6, 1993, has been considered. However, in view of the new ground of rejection, this comparison is not with the closest prior art. See In re Baxter Travenol Labs., 952 F.2d 388, 392, 21 USPQ2d 1281, 1285 (Fed. Cir. 1991). Accordingly, we find that appellants have not presented objective evidence, on this record, which would serve to rebut the prima facie case of obviousness established by Tachikawa II or EP ‘410. C. Summary 10Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NextLast modified: November 3, 2007