Grafting of polymers with fluorocarbon compounds
CA 2274947 A1 · Owner: Yang, Zhen Yu · Inventors: Yang, Zhen Yu; Drysdale, Neville Everton; Wang, Lin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fluorine containing terminal olefins may be grafted onto polymers containing hydrogen bound to carbon in the presence of free radicals. The olefins may also contain other functional groups. The resulting novel grafted polymers are useful as molding resins, for coating and as catalysts.
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 January 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2020.
- 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.