Appeal No. 1997-0218
Application No. 08/182,757
transportation industry as glazing materials for automobiles,
rail cars, farm tractors, boats, aircraft etc." (col. 7, lines
35-38). Baudin further teaches that "the thicker the coating
and the more silicon organo-functional silane present, the
stronger will be the bond between the glass sheet and the
polyvinyl-chloride" (col. 10, lines 21-24). The examiner
concludes that "[v]ariation in level of adhesion by varying
primer thickness, or applying primer coating to only portion
of interface, etc. would have been a simple matter of
optimization" (Answer, p. 10).
Appellants argue that Beckmann fails to suggest that the
adhesive strength can be altered so that the level of adhesion
between the inboard glass sheet and the film is greater than
the level of adhesion between the outboard glass sheet and the
film. See Brief, p. 12. Appellants further argue that
neither Beckmann nor Baudin suggests applying the silane
coating to certain portions of the interface between the film
and the glass sheet and not to others. See Brief, p. 14.
First, Baudin recognizes that adhesion is a result
effective variable. Accordingly, it would have been obvious
to one having ordinary skill in the art to adjust the level of
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