Polynorbonene and polyvinyl chloride thermoplastic elastomer
CA 2045401 C · Owner: Atochem · Inventors: Hert, Marius; Dousson, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The composition of the present invention is comprised of a mixture from 20 to 70 parts by weight of cross-linked polynorbornene from 80 to 30 parts by weight of a polymer based on vinyl chloride and at least one plastifier common to polynorbornene and to the polymer based on vinyl chloride in a quantity sufficient to lower the glass transition temperature of polynorbornene down to the range of rubbers. In order to prepare the thermoplastic composition comprising the cross-linked polynorbornene a blend of polynorbornene, vinyl chloride polymer a plastifier common to the polynorbornene and to the vinyl chloride polymer and a cross-linking system is mixed at a temperature and time duration …
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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 6, 1990 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2012.
- 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.