Thermoplastic resin composition
CA 2065321 C · Owner: Umeyama, Satoshi · Inventors: Yano, Motoichi; Fujiwara, Takayoshi; Kodama, Mikio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic resin composition comprises 100 parts by weight of a mixture of 10 to 85% by weight of a rubberreinforced styrene resin, 5 to 50% by weight of a saturated polyester resin and 10 to 70% by weight of at least one copolymer selected from the group consisting of an .alpha.-methylstyrene copolymer and a maleimide copolymer and 0.2, to 50 parts by weight of (D) an epoxy group-containing an olefinic copolymer, wherein the content of the rubbery polymer in the composition is from 5 to 25% by weight. This composition is excellent in sharpness and also in heat resistance, chemical resistance and impact resistance.
Read the whole patent
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 June 25, 1991 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.