Appeal No. 1996-0670
Application No. 08/043,388
mixed with the PSA, in order to form an admixture with the PSA
for the very same properties. “[T]he idea [or motivation] of
combining them flows logically from their having been
individually taught in the prior art.” Kerkhoven, supra. See
also In re Castner, 518 F.2d 1234, 1238-39, 186 USPQ 213, 217
(CCPA 1975); In re Crockett, 279 F.2d 274, 276, 126 USPQ 186,
188 (CCPA 1960); In re Sussman, 136 F.2d 715, 718, 58 USPQ
262, 264 (CCPA 1943); and Ex parte Quadranti, 25 USPQ2d 1071,
1072 (Bd. Pat. App. & Int. 1992).
Appellant’s arguments are not well taken for the
following reasons. Any holding from Baird, supra, is not
applicable to the fact situation of this rejection. The
choice or selection from the disclosure of Sackoff is rather
narrow, i.e., merely selecting an admixture of two classes of
polysiloxanes from the five classes of polysiloxanes disclosed
by Sackoff. Furthermore, Sackoff teaches a preference for
various classes of R values, including the classes
1
denominated as polysiloxanes (i) and (ii) in the claims on
appeal (see Sackoff, column 14, lines 39 and 62; column 15,
lines 6, 26, 41, and 46). Contrary to appellant’s
7
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