Poly(ethynylene phenylene ethynylene silylenes) comprising an inert spacer and methods for preparing same
CA 2428083 A1 · Owner: Levassort, Christian · Inventors: Buvat, Pierrick; Levassort, Christian; Delnaud, Laurent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns poly(ethynylene phenylene ethynylene silylene) polymers comprising an inert spacer in the main chain of the polymer. The invention also concerns methods for preparing said polymers and hardened products obtainable by heat treatment of said polymers. The inventive polymers can in particular be used in matrices for composites.
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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
- Filed November 9, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2023.
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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.