Appeal No. 1997-0530
Application 08/312,493
compatibilizing agent for the first and second polymers it
must have a composition which is different from the
compositions of these polymers. Thus, even if, as argued by
the examiner (answer, page 9), appellants’ second polymer can
be a polysiloxane copolymer, the compatibilizing copolymer
must have a composition which is different from that of the
second polymer in order for the compatibilizing copolymer to
be effective as a compatibilizing agent.
The examiner argues that appellants’ originally filed
specification does not provide written descriptive support for
“at least 0.3%” of the second polymer as recited in
independent claims 1 and 10 (answer, pages 4 and 10-11).
These claims actually recite a range of the amount of the
second copolymer
in the blend of “at least 0.3% but less than 30% by weight.”
Appellants’ original specification states (page 2, lines 11-
23) that in a prior art lacquer, which contained less than
0.3% of an internal solid lubricant, there was mutual
incompatibility of the lubricant and base polymer which
prevented incorporation of a sufficient quantity of lubricant.
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