Vinyl chloride resin compositions
CA 2067756 A1 · Owner: Mitsui Chemicals, Inc. · Inventors: Yamamoto, Youzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a vinyl chloride resin composition having an elevated heat distortion temperature comprising, I A a vinyl chloride resin and, II B a cycloolefin ring opening polymer or copolymer formed by ring opening polymerization of a cycloolefin represented by the formula I, or a hydrogenated product thereof, and/or, C a cycloolefin random copolymer of ethylene and a cycloolefin represented by the formula I said copolymer, having an intrinsic viscosity ? as measured in decalin at, 135°C, of 0.05 to 10 dl/g and a glass transition temperature Tg of at least 70°C, I , wherein n is 0 or 1 and m is 0 or a positive integer.
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 November 11, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 11, 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.