Powder coatings
CA 2006930 C · Owner: Ueno, Tasaburo · Inventors: Toyoda, Yuji; Ueno, Tasaburo; Tsutsui, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns powder coatings comprising thermoplastic or thermosetting type resin powder particles each particle carrying at least on the surface thereof a number of microparticles having an average diameter of 0.001 to 10µ of such resin as having a glass transition temperature of 50° to 150°C and a SP value of 9 to 15 said, microparticle optionally containing UV absorber or antioxidant or hardening catalyst, the weight ratio of said microparticles to the total weight of the powder coatings being 0.05 to 30% by weight. The present powder coatings are excellent in blocking resistance and capable of forming a coating with excellent stain resistance coating, appearance and other …
Read the whole patent
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 December 29, 1989 and granted October 22, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2011.
- 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.