Conjugated polycarbazole derivatives and process for the preparation thereof
CA 2324757 A1 · Owner: Universite Laval · Inventors: Leclerc, Mario; Morin, Jean-Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to conjugated polycarbazole derivates comprising repeating or alternating units of the formula: (see fig I) , wherein R is a linear or branched alkyl group containing 1 to 22 carbon atoms. The conjugated polycarbazole derivatives according to the invention have interesting optical and electrochemical properties which render them suitable for, use in the manufacture of diverse electrical optical and electro-optical , devices
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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 October 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2022.
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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.