Polycarbonate resin composition
CA 2046162 A1 · Owner: Yamamoto, Makoto · Inventors: Kato, Kohji; Hashimoto, Kazuto; Yamamoto, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a polycarbonate resin composition comprising (A) 100 parts by weight of a polycarbonate resin and (B) 1 to 80, parts by weight of an acrylic ester graft copolymer comprising grafting, on 100 parts by weight of an acrylic ester copolymer which comprises copolymerizing (i) 100 parts by weight of at least an acrylic ester monomer having 1 to 16 carbon atoms and (ii) 0.1 to 5 parts by weight of a polyfunctional allyl ester monomer and/or a polyfunctional methallyl ester monomer having a benzene ring as a skeleton, (iii) 15 to 100 parts by weight of at least a vinyl monomer selected from the group consisting of a methacrylic ester an, aromatic monovinyl compound and a vinyl …
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 July 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 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.