Fluorinated alkyl ether-containing ethylenes, precursors thereto, and copolymers thereof with tetrafluoroethylene
CA 1234151 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Anderson, Arthur W.; Holmquist, Howard E.; Fritschel, Scott J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Copolymers of TFE (tetrafluoroethylene) with fluorinated alkyl ethylenes which contain ether linkages are provided. The copolymers are thermally stable and useful as electrical insulation. Some of the copolymers contain functional groups and are hydrolyzable to fluorinated copolymers which contain acid functional groups. Novel monomers and precursors thereof are also provided.
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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
- Granted March 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
- 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.