Blends of polyolefin graft copolymers and polycarbonates
CA 2177238 C · Owner: Montell North America Inc. · Inventors: Phan, Tam T. M.; Eastenson, Kyle D.; Denicola, Anthony J. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a composition comprising, by weight (a) about 94% to about 30% of a, graft copolymer comprising a backbone of a propylene polymer material having graft polymerized thereto monomers that form grafted copolymers or terpolymers the, monomers being selected frorn the group consisting of (i) styrene and acrylonitrile and (ii), styrene and maleic anhydride or alpha-methylstyrene, styrene and maleic anhydride wherein the grafted copolymers or terpolymers formed from (i) or (ii) are present in an amount of about 10 to about 95 pph of propylene polymer material (b) about 5% to about, 40% of at least one aromatic polycarbonate and (c) about 1% to about 15% of at least one aliphatic …
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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 May 23, 1996 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2018.
- 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.