Copolymers containing aminoplast units and use thereof as a dispersing agent or stabilizer
CA 2471597 A1 · Owner: Schall, Norbert · Inventors: Coutelle, Helmut; Kraemer, Inge; Dziwok, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are water-soluble aminoplast-ether copolymers of the following structural type:, in which Z represents an aminoplast unit on the basis of unsubstituted glycoluril or glycoluril that has been substituted with a reactive OR group (R representing an alkyl group alkene group, alkyl ether , group, or alkyl ester group preferably a low alkyl group, for example a methyl group or ethyl group); B represents the remainder of an essentially water-insoluble polymer selected among poly-n-butyl acrylate poly-n-butyl , methacrylate, polyethyl acrylate polytetrahydrofuran, polyethylmethacrylate polymethylacrylate, polymethylmethacrylate mostly aliphatic polycarbonate or , mostly aromatic …
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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 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 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.