Thermoplastic polyesters with improved shock-proof properties and impact modifying composition
CA 2392392 C · Owner: Atofina · Inventors: Granel, Claude; Tran, Michael; Lacroix, Christophe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns thermoplastic polyesters (such as PET or PBT) comprising by weight, the total being 100 %: 60 to 99 % of thermoplastic polyester; 1 to 40 % of impact modifier comprising: (a) a core-shell copolymer (A) (b) an ethylene copolymer (B) selected among ethylene copolymers (B1) and an unsaturated carboxylic acid anhydride ethylene copolymers (B2) and an unsaturated epoxy compound and mixtures thereof (c) a copolymer (C) selected among ethylene copolymers (C1) and an alkyl (meth)acrylate ethylene copolymers (C2) and (meth)acrylic acid optionally neutralised and mixtures thereof. The invention also concerns an impact modifying composition which can be added in thermoplastic …
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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 November 23, 2000 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2022.
- 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.