Polymers of alkyl-1-vinylimidazoles
CA 2175353 A1 · Owner: Basf Aktiengesellschaft · Inventors: Jager, Hans-Ulrich; Detering, Jurgen; Schade, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymers of alkyl-1-vinylimidazoles and processes for the production thereof by the radical polymerisation of monomer mixtures comprising: (a) 10 to 100 wt. % at least one alkyl-1-vinylimidazole and (b) 0 to 90 wt. % 1vinylpyrrolidone, 1-vinylcaprolactam, 1-vinyltriazole 1-vinylimidazole, 1-, vinyloxazolidinone or mixtures thereof (c) 0 to 30 wt. % other , monoethylenically unsaturated monomers and (d) 0 to 10 wt. % a monomer containing at least 2 monoethylenically unsaturated double bonds in water, and at least one C1-C4 alcohol or mixtures thereof in the presence of polymerisation regulators. Also disclosed is the use of polymers at least 10 , wt. % of which is an …
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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 23, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2016.
- 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.