Appeal No. 94-3296
Application No. 07/878,899
pages 6 and 7. The cover tube is made with a vulcanizate of
particular rubber compositions having high weather and moisture
resistance. See specification, pages 2, 3 and 7 through 15. The
resistance to both weather and moisture allows the particular
rubber compositions to be used as a material for the cover tube
of the hose useful for the transport of refrigerants. Id.
Claim 6 is representative of the subject matter on appeal
and reads as follows:
6. A hose for use in the transport of refrigerants and
having high resistance to weather and moisture, said hose having
at least a core tube, a reinforcing layer over said core tube and
a cover tube over said reinforcing layer, at least said cover
tube being formed from a vulcanizate of a rubber composition
comprising a first copolymer rubber having an isobutylene unit
and a p-halogenated methylstyrene unit, a second copolymer rubber
having an isobutylene unit, a p-halogenated methylstyrene unit
and a p-methylstryrene unit or a mixture of said copolymer
rubbers, and wherein the proportion of said p-halogenated
methylstyrene unit in said first copolymer rubber and the
proportion of the sum of p-halogenated methylstyrene unit and
p-methylstyrene unit in said second copolymer unit is 1-20
percent by weight of the respective copolymer rubbers.
The references of record relied on by the examiner are:
Kitami et al. (Kitami ’036) 4,880,036 Nov. 14, 1989
Kitami et al. (Kitami ’736) 4,905,736 Mar. 06, 1990
European Patent Application having a publication number of
0 344 021, Powers et al., Nov. 29, 1989 (hereinafter referred
to as “Powers”).2
2This European Patent Application is referred to as “Exxon
Chemical Co.” by both the examiner and appellants.
2
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