Low-temperature-curable, solid polyurethane powder coating compositions containing uretdione groups
CA 2417474 A1 · Owner: Wenning, Andreas · Inventors: Wenning, Andreas; Spyrou, Emmanouil; Loesch, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are low-temperature-curable, solid polyurethane powder coating compositions containing uretdione groups and processes for preparing such compositions. The powder coating compositions contain quaternary ammonium hydroxides or fluorides as catalysts. The coating compositions of the invention are useful for producing plastics, especially powder coatings which, crosslink to high-gloss or matt light- and weather-stable, coating films.
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 January 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 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.