Acid composition comprising a coated polyvalent carboxylic acid solid particle and a powder coating comprising the same
CA 2226675 C · Owner: Amey, Ronald Lee · Inventors: Amey, Ronald Lee; Schurr, George Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acid composition comprises a polyvalent carboxylic acid solid particle coated with a polymer. The acid composition may function as a cross-linking agent in a powder coating, which also includes a resin. The resin and the polymer of the acid composition may be the same or they may be different. The , mean particle size of the coated acid solid particles is in the range of 0.5 to 50 micrometers. When used in a powder coating such coated solid particles , reduce or eliminate sublimation of the acid crosslinking agent from the powder coating during the curing step. In addition these coated solid particles , increase the storage shelf-life of the powder coating in which they are used. …
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 August 23, 1996 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2018.
- 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.