Novel polymer containing a modified cyclic monomer unit
CA 2178609 C · Owner: Imaizumi, Kimio · Inventors: Imaizumi, Kimio; Yamagishi, Hideyuki; Kato, Kiyoo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a polymer containing a modified cyclic monomer unit, comprising a polymer chain represented by the following formula (I):, wherein A to F are monomer units constituting a main chain of the polymer chain, in which monomer units A to F are arranged in any order, and ~ to q are, respectively weight percentages of, monomer units A to F based on the total weight of monomer units A to F; A is selected from cyclic olefin monomer units B is, selected from cyclic conjugated diene monomer units and C to F, are monomer units copolymerizable with monomer units A and B wherein each of S to X, which are modifying groups is a , functional group or an organic compound residue containing the …
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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 21, 1994 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2016.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.