Appeal No. 1997-0311
Application No. 08/340,017
thixotropic agents, such as polyvinyl alcohol, may also be
included in the aqueous dispersion (column 5, lines
16-22). Accordingly, we agree with the examiner that it would
have been prima facie obvious for one of ordinary skill in the
art to add a compound containing basic nitrogen and polyvinyl
alcohol to the aqueous dispersion of Gamon, which admittedly
comprises the presently claimed organopolysiloxane containing
groups which are capable of condensation (A), a condensation
catalyst (B) and an organopolysiloxane resin which is at least
partly soluble in the organopolysiloxane (C). We note and
emphasize that appealed claim 1 fails to reqire that
elastomers prepared from dispersions within the scope of claim
1 are transparent.
Appellants submit at page 4 of the Brief that
"Appellants' claimed composition is not limited to Gamon's
polydiorgano-siloxanes that must have terminal hydroxyl
groups." However, the claimed "groups which are capable of
condensation" clearly embrace the hydroxyl groups of Gamon
which are taught to undergo condensation, and appellants'
claim 4 specifies hydroxyl groups when R is a hydrogen atom.
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