Ethylene/.alpha.-olefin/7-methyl-1,6-octadiene copolymer rubber and composition of the same
CA 2087905 C · Owner: Kawasaki, Masaaki · Inventors: Honma, Kiyoshi; Takata, Toshimasa; Nakahama, Hidenari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The ethylene/.alpha.-olefin/7-methyl-1,6-octadiene copolymer rubber of the invention is a random copolymer rubber prepared using a Group IVB transition metal type catalyst containing a specific zirconium catalyst component and in, this copolymer rubber, a molar ratio of ethylene to .alpha.olefin, a diene content, an intrinsic viscosity .eta. an, intensity ratio D of T.alpha..beta. to T.alpha..alpha. in a 13C-NMR spectrum of, said copolymer rubber, a B value which is a measure of distribution of each monomers and a glass transition temperature are all within specific ranges. The rubber composition of the invention comprises the above-mentioned random copolymer rubber and a conjugated diene …
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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 January 22, 1993 and granted September 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2015.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.