Appeal 2007-0005
Application 10/198,489
(A) a resorcinol-formaldehyde resin; and
(B) a copolymer of from about 1 weight percent to about 10 weight
percent 2,3-dichloro-1,3-butadiene and from about 90 weight percent to
about 99 weight percent chloroprene.
The Examiner relies upon the following references as evidence of
obviousness:
Iwami US 3,525,703 Aug. 25, 1970
Atwell US 3,713,347 Jan. 30, 1973
Warmuth US 4,741,517 May 3, 1988
Burkley US 5,253,850 A Oct. 19, 1993
Fujiwara US 5,306,369 A Apr. 26, 1994
Fujimoto US 5,626,953 A May 6, 1997
Appellants’ claimed invention is directed to an airspring comprising
an air sleeve which, in turn, comprises a reinforcement layer and a rubber
cover adjacent to the reinforcement layer. The reinforcement layer
comprises a vulcanizable polychloroprene rubber composition and nylon
fibers. The nylon fibers are adhered to the polychloroprene rubber
composition with an adhesive comprising a resorcinol-formaldehyde resin
and a copolymer of 2,3-dichloro-1,3-butadiene and chloroprene. According
to Appellants’ Specification, an airspring comprising an air sleeve
comprising a reinforcement layer of a vulcanizable polychloroprene rubber
composition and nylon textile fibers was known in the art at the time of
filing the present application, as was the use of an adhesive for bonding the
polychloroprene rubber and nylon fibers. The specification discloses that
“air sleeves using SBR-based adhesives have shown poor adhesion between
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Last modified: November 3, 2007