Base resistant fluoroelastomers with improved processibility and curability
CA 2037235 A1 · Owner: E.I. Du Pont De Nemours And Company · Inventors: Carlson, Dana P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Base-resistant peroxide-curable fluoroelastomers with improved processibility comprising a polymeric chain having tetrafluoroethylene as one comonomer copolymerized with monomerunits selected from the group (a) propylene (b), propylene and vinylidene fluoride and (c) a C2-3 hydrocarbon olefin and one or more perfluoro(alkyl vinyl ethers); said polymer chains having terminal iodo-groups. D-5723
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 February 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 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.