A method for preparation of a liquid polymer composition and use of this composition
CA 2392780 C · Owner: Eisenberg, Boris · Inventors: Eisenberg, Boris; Muller, Michael; Roos, Sebastian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns a method for preparation of a liquid polymer composition, where ethylenically unsaturated monomers are polymerized by means of initiators that have a , transferable atomic group and one or more catalysts that contain at least one transition metal, in the presence of ligands that can form a coordination compound with the metallic , catalyst(s), the catalyst is oxidized after the polymerization and then the catalyst is separated , by filtration, where the composition contains a solvent with a dielectric constant less than or , equal to 4.
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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 18, 2000 and granted May 24, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.