Process for producing polymer, the polymer and curable composition comprising the polymer
CA 2333925 A1 · Owner: Kitano, Kenichi · Inventors: Kitano, Kenichi; Fujita, Masayuki; Nakagawa, Yoshiki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for polymer production which comprises subjecting a (meth)acrylic acid monomer, etc. to atomic-transfer radical polymerization and replacing a terminal halogen group of the resultant polymer with a carboxylic acid type group, e.g. a carboxylate group. The replacement reaction can be accelerated by conducting the reaction using as a catalyst a transition metal complex having as the central metal an element in Group 7 8, 9, 10, or 11 of the , Periodic Table in the presence of a nitrogenous compound. As a compound having the carboxylic acid type group, use is made of a polymer a polymer having a , carboxylic acid type group in a side chain a compound having two or more , …
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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 June 1, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2021.
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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.