A polymer composition containing an extrusion processing aid comprising a fluorocarbon elastomer and vinylidene fluoride
CA 2027099 C · Owner: Chapman, George Richard, Jr. · Inventors: Priester, Donnan Edwin; Chapman, George Richard, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extrusion process for difficultly-melt-processible resins for, example, a difficulty-melt-processible hydrocarbon polymer having improved processibility and having incorporated therein an elastomeric fluorocarbon copolymer, for example an amorphous, vinylidene fluoride copolymer and a crystalline vinylidene fluoride polymer.
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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 October 5, 1990 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 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.