Power coatings based on thermoset-modified and other polyesters
CA 2428357 A1 · Owner: Degussa Ag · Inventors: Grenda, Werner; Weiss, Jorn Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a polyurethane powder coating material comprising:, A) from 3 to 35% by weight of a polymeric composition comprising:, 1. at least one polymer (such as a polyester polyol) and, 2. at least one thermoset in an amount of from 0.5 to 50% by weight, based on the sum of 1. and 2. the thermoset being prepared by reaction in the polymer matrix A1) of: a) at least one starting component containing NH2 groups, and, b) at least one starting component containing NCO groups, where the components a) and b) have each a functionality of >=2, while at least one of them has a functionality of >2 and is present in an amount of from 0.5 to 100% by weight;, B) from 15 to 45% by weight of at least …
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 8, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2025.
- 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.