Powder coatings based on branched oligoesters and non-emissive uretdione polyisocyanates
CA 2344540 A1 · Owner: Hexion Specialty Chemicals, Inc. · Inventors: Panandiker, Kamlesh P.; Bronk, John Michael; Spitler, Franklin Paul
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 powder coating compositions which can be cured at low temperatures. The powder coating composition of the invention includes a unique combination of a branched oligoester polyol and uretdione cross-linking agent which when cured results in a coating binder with desirable hardness, flexibility, solvent resistance corrosion resistance, weatherability and gloss.
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 September 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2021.
- 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.