Appeal No. 95-0808
Application 08/048,866
This is an appeal from the examiner’s final rejection of
claims 1-10. Claims 11-20, which are the only other claims in
the application, stand withdrawn from consideration by the
examiner as being directed toward a nonelected invention.
THE INVENTION
Appellants’ claimed invention is directed toward an
optically transparent coating composition which reduces
transmission of ultraviolet radiation. The composition
consists essentially of 1) an alkoxide which has a recited
general formula and is partially hydrolyzed, and 2) the
reaction product of tetraalkylsilicate and cerium oxide.
Appellants state that this composition is useful for forming
coatings on plastics such as polycarbonate which protect the
plastics from damage caused by ultraviolet radiation
(specification, page 1). Claim 1 is illustrative and reads as
follows:
1. An optically transparent coating composition which
reduces transmission of ultraviolet radiation consisting
essentially of:
a. a partially hydrolyzed alkoxide of the general
formula R M(OR') wherein R is an organic radical, M is
x z-x
selected from the group consisting of silicon, aluminum,
titanium, zirconium and mixtures thereof, R' is a low
molecular weight alkyl radical, z is the valence of M, and x
-2-2
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