Appeal 2007-3191
Application 10/482,217
phosphate salt; a phosphorous oxo acid or a mixture thereof (Gallagher,
col. 7, ll. 58-64).
11) According to Gallagher, the suitability of a particular compound
for use as a stabilizer and the determination of how much is to be used as
a stabilizer may be readily determined by preparing a mixture of the
polyester component, the polycarbonate and the filler with and without
the particular compound and determining the effect on melt viscosity or
color stability or the formation of interpolymers (Gallagher, col. 7, l. 64-
col. 8, l. 3).
12) Gallagher claim 8 is directed to a composition comprising, inter
alia, 20-90 wt% of a heteropolymer thermoplastic resin blend and “an
effective amount of a stabilizer selected from phosphites, acidic
phosphate salts, phosphate salts of Group IB or Group IIB metal and
phosphorous oxoacids.”
13) Gallagher lists the following acidic phosphate salt stabilizers:
sodium dihydrogen phosphate, monozinc phosphate, potassium
dihydrogen phosphate, calcium hydrogen phosphate and the like
(Gallagher, col. 8, ll. 4-6).
14) According to Gallagher, polytetrafluoroethylene may also be
added to enhance flame retardance as a drip inhibitor, generally in an
amount of from 0.01-10 weight percent and more preferably from 0.01-5
weight percent (Gallagher, col. 8, ll. 21-25).
ANALYSIS AND CONCLUSIONS
Appellant contends that the Examiner’s rejection is based on improper
hindsight reconstruction (Br. 5). Contrary to Appellant’s contention, we find
that the Examiner has established a prima facie case of obviousness for the
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