Flame retardant cyclic olefinic polymer composition
CA 2006091 C · Owner: Mitsui Chemicals, Inc. · Inventors: Sakai, Hideki; Yamamoto, Yohzoh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flame retardant cyclic olefinic polymer corn, position which comprises, A (s) a cyclic olefinic random copolymer formed from an ethylenic component and a cyclic olefinic component represented by the following general formula I, or, (b) a ring-opened polymer of a cyclic olefinic component represented by the folowing general formula I or a hydrogenated derivative of the polymer, which copolymer or polymer has a limiting viscosity of 0.01 to 10 dl/g measured in decalin at 135 °C and a softening temperature (TMA) of 70 °C or more; B a halogen type flame retardant, C an antimony type flame retardant and, D polytetrafluoroethylene, and if desured E at least one copolymer selected from an …
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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 December 20, 1989 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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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.