Process for making fluoropolymer composites
CA 2128236 C · Owner: Weeks, Gregory Paul · Inventors: Weeks, Gregory Paul; Deakyne, Clifford Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of structural and semi-structural composites formed by compressing sheets of nonwoven preform materials formed from aqueous blends of reinforcing fibers and thermoplastic fluoropolymer pulps. The pulps are formed of film-like flakes having an irregular periphery with microlibrils extending therefram. The composites are useful in applications which reguire higher strength and/or modulus and where chemical and/or heat , resistance is needed as in chemical processing.
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 December 30, 1992 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 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.