Method for the production of polymer compositions with reduced halogen content, reduced-halogen polymer compositions and utilization thereof
CA 2448914 C · Owner: Roos, Sebastian · Inventors: Bollinger, Joseph Martin; Roos, Sebastian; Scherer, Markus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the production of polymer compositions with a reduced living halogen content, wherein ethylenically unsaturated monomers are polymerized using initiators having a transferable halogen and one or more catalysts comprising at least one transition metal in the presence of ligands that can form a coordination compound with the metal catalyst or catalysts. After polymerization, the living halogen atoms contained in the polymer are eliminated at least partly wherein the polymer, composition is reacted after polymerization with at least one organic nitrogen compound in the presence of a non-polar solvent. The invention also relates to polymer compositions …
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 April 23, 2002 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2024.
- 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.