Composition coextrudable with poly(vinylidene fluoride) for making the latter adhere to a non-compatible polymeric resin -compound obtained with this
CA 2037113 C · Owner: Strassel, Albert · Inventors: Duperray, Gilbert; Strassel, Albert; Rocher, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coextrudable composition with poly(vinylidene fluoride) enabling it to stick to polymeric resins incompatible with it characterized by the fact that the said composition is made up of: 27 to 50 parts by weight of alkyl polymethacrylate 73 to 50 parts by weight of an additive itself made up of 100 parts by weight of additive of 35 to 50 parts by weight of PVDF 65 to 50 parts by weight of acrylic or methacrylic elastomer. This composition is used to make poly(vinylidene fluoride) composites able to coat polymers incompatible with poly(vinylidene fluoride). With this composition used as an adhesive intermediary, poly(vinylidene fluoride) composite materials for polymers incompatible with …
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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 February 25, 1991 and granted June 9, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 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
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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.