Appeal No. 1997-0009
Application No. 08/074,819
temperature vulcanizing) and RTV (room temperature
vulcanizing) silicone compositions.
To wit, Noll in particular suggests, that HTV compositions
basically contain at least 20 parts by weight of fillers,
preferably reinforcing fillers such as silica (p. 400-401);
whereas the fillers used in RTV formulations "are almost all
inert materials" and the use of reinforcing fillers is limited
(p. 407). To the same effect, appellants aver in their
disclosure (page 1, l. 16-20):
One-component RTV silicone compositions contain
reinforcing fillers in amounts of not more than
10% by weight. In contrast, the content of
reinforcing filler in HTV silicone compositions
is at least 20% by weight.
Bearing the foregoing in mind, we agree with appellant
that Stary does not anticipate appellants’ invention which
relates to the processing of an HTV formulation containing "at
least
20 parts by weight of . . . silicone dioxide." In contrast,
the Stary process relates only to production of RTV
formulations. Stary does indicate that a reinforcing filler,
such as silica, may be present in the formulation and, in
Example 1, apparently discloses an RTV composition having
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