Appeal No. 1996-3214 Page 6
Application No. 08/195,897
i.e., (1) an ethylenically unsaturated epoxide and (2) an
organohydrogen siloxane or an organohydrogensilane.
Mendicino discloses the addition of a hydrogen chloride
acceptor such as a tertiary amine to a reaction mixture of an
unsaturated epoxy compound and silicon hydride compounds
including silanes and siloxanes (column 3). A chloroplatinic
acid catalyst is employed for the reaction.
Gorshkov compares the use of Tetraorganoammonium salts of
platinum with chloroplatinic acid for catalyzing the
vulcanization of siloxane rubber via a hydrosilation reaction.
Our review of Gorshkov reveals a lack of any teaching or
suggestion therein of the in situ formation of a catalyst as
claimed herein via reaction of a quaternary ammonium,
phosphonium, or arsonium salt as specified in claim 14 with a
haloplatinate material in the presence of a reactant mixture as
called for in claim 14, the sole independent claim on appeal.
Nor has the examiner pointed to any disclosure of Mendicino
that would have suggested to one of ordinary skill in the art
the addition of a quaternary ammonium, phosphonium, or arsonium
salt as specified in appealed claim 14 to the reaction mixture
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007