Macromers of vinylidene fluoride, acrylate-terminated poly(vinylidene fluoride) and its copolymeric thermoplastic elastomers
CA 2082860 A1 · Owner: The B.F. Goodrich Company · Inventors: Nicholas, Paul Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymers prepared from vinylidene fluoride having controlled molecular weights and sulfate end groups are described. The sulfate end group can be displaced with acrylic-type acids to produce the corresponding acrylate terminated poly(vinylidene fluoride) macromolecular monomers. These macromolecular monomers can be copolymerized with acrylates that give rubbery homopolymers to form thermoplastic elastomers.
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 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2014.
- 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.