Appeal No. 1997-0218
Application No. 08/182,757
silane is further disposed on either side of the polyvinyl
chloride film and acts as an adhesion promoter between the
film and the glass sheets.
Beckmann discloses a laminated safety glass comprising a
plasticized polyvinyl chloride film bonded on each side to a
glass plate with the aid of an organofunctional silane.
Preferred silanes include "alkylene alkoxysilanes containing
amino and/or imino or epoxy groups, one or both of the
hydrogen atoms of the amino group being replaced by an amino
or hydroxyalkyl of polyamino moiety" (col. 5, lines 38-43).
However, in Example 5, for purposes of comparison, Beckmann
discloses a laminated glass wherein the plasticized polyvinyl
chloride film is bonded on each side to a glass plate using a
gamma mercaptopropyltrimethoxysilane (see Table III; see also
Example 14). Therefore, the teachings of Beckmann alone
satisfy the limitations of claim 42. See In re Gurley, 27
F.3d 551, 553, 31 USPQ2d 1130, 1132 (Fed. Cir. 1994) ("A known
or obvious composition does not become patentable simply
because it has been described as somewhat inferior to some
other product for the same use.").
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