Acetophenone oxime-blocked pu powder coatings and their use
CA 2213547 A1 · Owner: Gras, Rainer · Inventors: Wolf, Elmar; Gras, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a storage-stable, heat-curable polyurethane powder coating composition comprising: a) at least one polyisocyanate component blocked totally or partially with acetophenone oxime b) a hydroxyl-containing polymer, and, c) if required appropriate auxiliaries or additives. The powder coating composition may be cured at a temperature, for example 160-180°C, lower than that employed in prior art.
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 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 2019.
- 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.