Appeal No. 95-0808
Application 08/048,866
cerium oxide as the ultraviolet ray absorbent in Fujioka’s
overcoat layer composition. In Fujioka’s Example 4, the
reaction mixture is left standing at room temperature for more
than 20 hours. Appellants’ specification (page 6) indicates
that stirring a mixture of tetraethylorthosilicate and cerium
oxide for 4 hours at room temperature produces a reaction
product. Thus, it reasonably appears that if a reaction
product is formed in appellants’ example, then including
cerium oxide in Fujioka’s mixture, which stands at the same
temperature for a much longer time period, also would produce
a reaction product.
Appellants argue that Fujioka does not disclose cerium
oxide and that Schroeder does not disclose or suggest the
reaction product of cerium oxide and tetraalkylsilicate or the
addition of the reaction product to the partial hydrozylate of
an alkoxide (brief, page 5). This argument is not persuasive
because appellants are attacking the references individually
when the rejection is based on a combination of references.
See In re Keller, 642 F.2d 413, 426, 208 USPQ 871, 882 (CCPA
1981); In re Young, 403 F.2d 754, 757-58, 159 USPQ 725, 728
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