Appeal No. 97-0139
Application No. 08/196,819
the examiner cites the "secondary references" to Wong and
Temple for their respective teachings of the use of the
claimed polyvinylacetate polymers as film forming polymers
used in aqueous sizing compositions for glass fibers.
With regard to the relied upon "secondary references,"
Wong discloses that film formers that have been used in
combination include epoxies, polyvinylacetate and polyesters
(column 4, lines 65 through 68), and that the combination of
film formers improves the handleability or processing
characteristics of the glass fibers (column 4, lines 38
through 41) as well as the strand integrity (column 3, lines
30 through 33). In like manner, Temple discloses the use of
an aqueous sizing composition for glass fibers comprising,
inter alia, an epoxy polymer and a polyvinylacetate/silane
copolymer which produces sized glass fibers in chopped form
that have good strength and flow properties which leads to the
formation of reinforced thermosetting materials having "good
strength" (column 1, lines 7 through 13).
Based on the known advantages associated with the use of
polyvinylacetate polymers in combination with epoxies and
polyester film forming polymers in aqueous sizing compositions
5
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007