Appeal No. 1997-0530
Application 08/312,493
For the above reasons, we conclude that the examiner has
not carried the burden of establishing a prima facie case of
obviousness of appellants’ claimed invention over
Haubennestel. We therefore reverse the rejection under 352
U.S.C. § 103 over this reference.
Rejection under 35 U.S.C. § 103
over Haubennestel in view of Takekoshi
Takekoshi discloses block copolymers of polyarylene
sulfides and polyetherimides or polydiorganosiloxanes and
teaches that they are useful as compatibilizers for blends of
polyarylene sulfides with other polymers such as
polyetherimides and polydiorganosiloxanes (col. 1, lines 7-
16).
The examiner argues that Takekoshi would have motivated
one of ordinary skill in the art to use two distinct siloxanes
in Haubennestel’s polymer blend in order to improve the heat
distortion properties of the lacquer (answer, pages 6 and 17).
2The examiner applies Haubennestel in view of Preston to
dependent claim 14, but does not rely upon any teaching in
Preston which remedies the above-discussed deficiency in
Haubennestel.
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