Method of producing reactive silicon group-containing polyether oligomers
CA 2293172 A1 · Owner: Iwakiri, Hiroshi · Inventors: Iwakiri, Hiroshi; Ito, Hiroshi; Jyono, Hideharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of producing a reactive silicon group-containing polyether oligomer which comprises reacting (a) a polyether oligomer having main chain of a polyether and, in each molecule, at least one unsaturated group represented by the general formula (1): H2C=C(R1)-R2-O- (1), (in the formula, R1 is a hydrocarbon group containing not more than 10 carbon atoms and R2 is a divalent organic group containing 1 to 20 carbon atoms and one or more species selected from the group consisting of hydrogen, oxygen and nitrogen atoms as a constituent atom) or the general formula (2): HC(R1)=CH-R2-O- (2), on a side chain or at a terminus with (b) a reactive silicon group-containing …
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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 December 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2021.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.