Appeal No. 1997-3175
Application 08/521,545
backbone for the disclosed mordant and even if, as argued by
the examiner (answer, pages 9-10), one of ordinary skill in
the art would have considered Breton’s polymer as a possible
backbone for Farooq’s mordant because Breton’s polymer is used
in an ink composition, the examiner has not established a
prima facie case of obviousness.
Moreover, the examiner has not explained why, even if the
references were combined as proposed by the examiner,
appellant’s claimed invention would be obtained. Farooq’s
guanyl hydrazone salts are attached to the backbone via N-
heterocycles or N,N-dimethylaminoethyl methacrylate, and those
of Delfino are attached via -COO- or a -COO-alkylene group.
The examiner has not explained why the references would have
led one of ordinary skill in the art to appellant’s mordant in
which the guanyl hydrazone salts are attached to the backbone
by a N H X group.+ -
2
For the above reasons we conclude that the examiner has
not carried the burden of establishing a prima facie case of
obviousness of appellant’s claimed invention.
DECISION
7
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