Appeal No. 1999-2201
Application No. 08/704,063
that Kurita suggests that the alkenyl group in this
polyorganosiloxane may be groups such as 1-hexenyl (id., citing
col. 3, l. 28).
The examiner applies Keryk for the disclosure of similar
silicone release coatings to those of Kurita with the teaching of
advantages for the use of higher alkenyl groups in olefinic
polyorganosiloxanes corresponding to component (A)(Answer, page
4). From these findings, the examiner concludes that it would
have been obvious to employ higher alkenyl radicals as taught by
Keryk for the alkenyl groups of the polyorganosiloxane of Kurita
for the attendant advantages, i.e., a faster and more complete
hydrosilylation reaction with improved releasability (Answer,
page 5). We agree.4
Appellants argue that Kurita requires an acetylenic bond
attached to the silicon atom for component (D) whereas none of
the claimed compounds (D) used as inhibitors contain such a bond.
4The examiner applies Hara, JP ‘786 and Lee to show the
conventional use in this art of various species of silylated
acetylenic hydrosilylation inhibitors, as recited in claim 36
(Answer, page 5). Since we base our decision on claim 35, as
discussed above, a discussion of these references is unnecessary
to our decision regarding this rejection. Additionally, we note
that appellants have admitted that various silylated acetylenic
hydrosilylation inhibitors are known in the art, citing Lee and
JP ‘786 among other references (specification, page 2, last line,
to page 5, line 28).
4
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