Method of treating surface of molded article of thermoplastic elastomer composition
CA 2039739 C · Owner: Sogabe, Satoru · Inventors: Sogabe, Satoru; Katoh, Kohichiroh; Shinonaga, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for treating the surface of a molded article, which comprises a combination of the steps of: providing a molded article made of a thermoplastic elastomer composition obtained by a thermal treatment of a mixture in the presence of an organic peroxide which mixture, is comprised of (A) an oil-extended olefinic copolymer rubber of an olefinic copolymer rubber having a Mooney viscosity (ML1+4100°C) of 90-200 and a mineral oil type softening agent (B) an olefinic plastic, and (C) a bismaleimide compound the, ratio by weight of (A) the oil-extended olefinic copolymer rubber to (B) the olefinic plastic, A/B being 24/76 - 80/20, the content of (C) the bismaleimide compound being 0.1-3 …
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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 April 10, 1991 and granted December 17, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.