Resin composition for thermosetting coating
CA 2073145 C · Owner: Kano, Taisaku · Inventors: Kano, Taisaku; Miyazaki, Eiichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed in a resin composition for thermosetting coating, which comprises:, (a1) an acrylic copolymer having a particular acid value and/or (a2) an acrylic copolymer having a particular acid value and a particular hydroxyl value (b) an acrylic copolymer having a particular epoxy equivalent, (c) a monobasic acid having a dissociation constant (pKa) of 3 or less, and, as necessary, (d) an amino resin and, (e) a quaternary phosphonium salt wherein the equivalent ratio of the acid groups of (a1) and/or (a2) to the epoxy groups of (b) is 1:0.5 to 0.5:1 and the amounts of (c), (d) and (e) are 0.01-5 parts by weight 1-25 parts by weight and 0.01-3 parts by weight respectively, per 100 parts by …
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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 3, 1992 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2014.
- 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.