Powder coating compositions and their use for coating heat-resistant substrates
CA 2069719 C · Owner: Halpaap, Reinhard · Inventors: Rettig, Rainer; Kreuder, Hans-Joachim; Bock, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a powder coating composition for the production of non-yellowing flexible coatings which is solid below 30°C and liquid above 120°C and contains a mixture of, A) a polyisocyanate component which i) has a content of blocked isocyanate groups (expressed as NCO, molecular weight = 42) of 3.0 to 14.0 by weight, ii) has a functionality, based on the blocked isocyanate groups, of 1.9 to 2.3 and, iii) and contains at least one .epsilon.-caprolactam-blocked polyisocyanate based on the reaction product of 4,4'-diisocyanatodicyclohexyl methane with a polyol component having an average molecular weight of 90 to 400 and containing at least 50% by weight based on, the …
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 May 27, 1992 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 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.