Low gloss powder coating composition and method for coating therewith
CA 2131745 C · Owner: Shimada, Eiji · Inventors: Sugimoto, Tadashi; Umehara, Takafumi; Shimada, Eiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powder coating composition for forming a low gloss coating film based on thermosetting polyester resins exhibiting only a little fluctuation of the resultant low gloss value even if an unequality in the mixing proportion of components or in the baking condition exists, comprising three thermosetting polyester resins (A), (B) and (C) and a hardener (D) wherein the weight ratio of the polyester resin (A) to the polyester resin (B) is in the range of 90/10 70/30 and that of the polyester resin (A) to the polyester resin (C) is in the range of 85/15 - 60/40 and the equivalent ratio of the polyester resin (A B, or C) to the hardener (D) is each in the range of 0.8 to 1.25 and wherein the …
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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 September 9, 1994 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 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
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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.