Aqueous coating composition
CA 2125597 A1 · Owner: Takeuchi, Kunihiko · Inventors: Ishii, Keizou; Sho, Katsuhiko; Imamura, Tsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-, Abstract, The present invention is directed to an aqueous coating composition comprising: (A) 10 to 95% by weight (based on solid content) of a film forming polymer which is prepared by neutralizing at least a portion of the acid groups contained in a copolymer having a number average molecular weight ranging from 6,000 to 50,000 prepared by copolymerizing (A1) 5 to 40% by weight of an amide groupcontaining ethylenically unsaturated monomer (A2) 3 to 15%, by weight of an acid group-containing ethylenically unsaturated monomer, (A3) 10 to 40% by weight of a hydroxyl group-containing ethylenically unsaturated monomer and (A4), a remainder amount of ethylenically unsaturated monomers other …
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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 10, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2016.
- 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.