Process for producing ring-opening metathesis polymer
CA 2597143 C · Owner: Iwasaki, Hideharu · Inventors: Iwasaki, Hideharu; Inubushi, Yasutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process of producing a ring-opening metathesis polymer of the present invention is mainly characterized in that a treatment to decrease the amount of oxygen and/or peroxide in at least one kind of polymerization starting material is performed prior to the ring-opening metathesis polymerization reaction of a cyclic olefin performed in the presence of a ruthenium carbene complex (catalyst). As used herein, the "polymerization starting material" refers to various materials used for a ring-opening metathesis polymerization reaction and present in the reaction system, such as ruthenium carbene complex (catalyst) and cyclic olefin (monomer), as well as solvents, chain transfer …
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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 February 7, 2006 and granted May 7, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.