Nonionically and partially anionically stabilized water-dispersible polyurethane/acrylic graft copolymers
CA 2021326 C · Owner: Balatan, Sergio E. · Inventors: Balatan, Sergio E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water-dilutable polyurethane/acrylic copolymers which may be either completely nonionically stabilized or partically nonionically and partically anionically stabilized comprise the reaction product of an ethylenically terminated polyurethane macromonomer containing poly(oxyalklyene) segments and one or more ethylencially unsaturated monomers selected from acrylic acid, methacruylic acid, fumaric acid, styrene vintyltoluene, and alkyl and hydroxyalkyl esters of acrylic, methacrylic, and furamic acids. The copolymers are useful as principal resins and as pigment grind resins in water-borne automotive base coat paint formulations.
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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 July 17, 1990 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2012.
- 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.