Appeal No. 2006-1761
Application No. 10/153,074
May 27, 2005). We have jurisdiction pursuant to 35 U.S.C. § 134.
According to appellants, the invention is directed to a
process of sealing two or more fuel cell components in a fuel
cell or fuel cell stack, which process comprises applying a
curable elastomeric sealing composition as specified in the
claims on appeal (Brief, page 2). Independent claim 1 is
illustrative of the invention and is reproduced below:
1. A process of sealing two or more fuel cell
components in a fuel cell or fuel cell stack, said process
comprising applying a curable elastomeric sealing
composition onto at least one component to be sealed or
between two components to be sealed, said curable
elastomeric sealing composition comprising
component (A) comprising at least one
polyorganosiloxane (I) bearing on average at least two
alkenyl groups per molecule;
component (B) comprising at least one
polyorganosiloxane (II) bearing on average at least two Si-
bonded hydrogen atoms per molecule;
an effective amount of hydrosilylation catalyst (IV);
and
an additive (III) comprising an organic sulfur
compound, an organosilicon sulfur compound, or mixture
thereof,
and vulcanizing said curable elastomeric sealing
composition to form a seal between said two or more fuel
cell components.
2
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