Aqueous coating compositions
CA 2342885 A1 · Owner: Yokoyama, Ayumu · Inventors: Mcintyre, Patrick F.; Spinelli, Harry J.; Yokoyama, Ayumu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous coating composition containing: (a) an aqueous carrier medium; (b) pigment having a pH below 7.0; (c) an AB block copolymer pigment dispersant resin of 1) an A block of a hydrophobic polymer having amine groups and 2) a B block of a hydrophilic polymer having hydroxyl groups and carboxyl groups; the AB block copolymer has a number average molecular weight of 5,000-20,000 and contains 20-80 % by weight of a polymeric A segment and correspondingly 80-20 % by weight of a polymeric B segment; wherein the pigment and the dispersant are present in a pigment to dispersant weight ratio of 0.1/1 20/1; (d) a film forming polymeric binder containing carboxyl groups and (e) a …
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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 October 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2021.
- 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.