Appeal No. 1996-4135 Page 4
Application No. 08/346,325
OPINION
We have carefully considered the respective positions
advanced by the appellant and the examiner. For the reasons
set forth below, we will not sustain any of the examiner's
stated rejections.
Okamoto discloses the preparation of polycarbonate-
polyorganosiloxane copolymers in which the polysiloxane may
include a dimethylsiloxane monomer. Okamoto teaches use of 2-
allyl phenol in the preparation of polydimethylsiloxane (PDMS)
in example 1-4, the PDMS being disclosed as useful in preparing
a polycarbonate-polysiloxane copolymer as in example 3-6 of
Okamoto.
The examiner correctly acknowledges that Okamoto does not
disclose polycarbonate-polysiloxane block copolymers having 4-
allyl phenolic links between a polysiloxane and polycarbonate
segments thereof as required by the appealed claims (answer,
pages 3-5). According to the examiner, however, it would have
been obvious to substitute 4-allyl phenol for the 2-allyl
phenol used in preparing the reactive PDMS of Okamoto and to
ultimately arrive at the herein claimed copolymer by the
subsequent use of such a modified PDMS in preparing a
Page: Previous 1 2 3 4 5 6 7 8 9 10 Next
Last modified: November 3, 2007