Stock material or miscellaneous articles – Composite – Of metal
Reexamination Certificate
2007-10-30
2007-10-30
Wu, David W. (Department: 1713)
Stock material or miscellaneous articles
Composite
Of metal
C428S463000, C428S461000, C092S048000, C092S049000, C524S565000, C524S566000, C524S571000, C524S492000
Reexamination Certificate
active
10712549
ABSTRACT:
The rubber compositions described herein have been found to have an exceptionally long life as a spring-biased actuator diaphragm material that maintains its position compressed, e.g., bolted, between opposed flanges, while maintaining excellent compressibility, low temperature flexibility, hydrocarbon resistance, abrasion resistance and mechanical strength. The compositions include a copolymer rubber component; a plasticizer for the copolymer rubber; a vulcanizing agent for the copolymer rubber; a silica filler; and a coupling agent, such as a silane coupling agent, capable of coupling the silica filler to the copolymer rubber.
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Fisher Controls International LLC
Lee Rip A.
Marshall & Gerstein & Borun LLP
Wu David W.
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