Appeal No. 1996-3657
Application No. 08/201,517
Appellants’ acknowledge on page 3 of their brief that the
appealed claims stand or fall together. Accordingly, we limit
our consideration to claim 21, the sole independent claim,
which reads as follows:
21. A release agent for improving the release and
antideposition characteristics of a hard impermeable surface
comprising an aqueous solution formed by combining (i) 1-5% by
weight of a dimer of at least two alkoxy functional silanes,
(ii) an aqueous silicone emulsion of a polydiorganosiloxane,
the solution including 1-5% by weight of the
polydiorganosiloxane, (iii) the total content of water in the
solution being 60-98% by weight including the water of the
emulsion; and (iv) 1-30% by weight of a water soluble
hydrophilic organic solvent selected from the group consisting
of ethylene glycol, propylene glycol, ethylene glycol n-butyl
ether, ethylene glycol phenyl ether, diethylene glycol methyl
ether, diethylene glycol n-butyl ether, propylene glycol
methyl ether, propylene glycol methyl ether acetate,
dipropylene glycol methyl ether acetate, propylene glycol n-
butyl ether, propylene glycol phenyl ether, dipropylene glycol
methyl ether, dipropylene glycol n-butyl ether, and
tripropylene glycol methyl ether.
The examiner relies upon the following three prior art
references as evidence of obviousness:
Narula et al. (Narula) 5,205,860 Apr. 27,
1993
Price 4,478,911 Oct. 23,
1984
Roth 4,209,432 June
24, 1980
The claims on appeal stand rejected for obviousness under
2
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