Powder paint and a polyester resin for powder paint
CA 2012659 C · Owner: Houweling, Marten · Inventors: Hofkamp, Albertus R.; Misev, Tosko A.; Houweling, Marten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a powder paint comprising a, polyepoxy compound, a polyester resin and customary additives the polyester resin having an acid number ranging from 15 through 70 and a hydroxyl number of 10 or below and being substantially based on units of dicaboxylic acids glycols and, monomers of functionality three of higher as dicarboxylic, acids use is being made of at least 75 mole % of isophthalic acid and at least 5 mole % of 1,4-cyclohexane dicarboxylic acid, as the glycols use is being made of at least 50 mole % of branched aliphatic glycols with 5-11 carbon atoms which may, optionally comprise an ester group and at most 50 mole % of, aliphatic glycol with 2-6 carbon atoms …
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 March 21, 1990 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.