Hydrogenated copolymer rubber, rubber composition comprising said rubber, and rubber product obtained from the rubber
CA 2001005 A1 · Owner: Japan Synthetic Rubber Co. Ltd. · Inventors: Sakabe, Nobuyuki; Miyabayashi, Toshio; Ise, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydrogenated copolymer rubber which is a hydrogenation product of a random copolymer rubber consisting of:, (A) 30-70 mole % of a unit derived from at least one monomer selected from the group consisting of alkyl acrylates and alkoxy-substituted alkyl acrylates (B) 20-70 mole % of a unit derived from at least one conjugated diene, and, (C) 0-10 mole % of a unit derived from at least one other ethylenically unsaturated compound copolymerizable with the components (A) and (B) (A) + (B) + (C) = 100 mole % wherein at least 90% of the double bonds of the conjugated diene unit is hydrogenated; a crosslinkable rubber composition comprising said hydrogenated copolymer rubber and a crosslinking …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 19, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2011.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.