Heat curable mixtures and their use for the formation of coatings on heat resistant substrates
CA 2019535 C · Owner: Nachtkamp, Klaus · Inventors: Noble, Karl-Ludwig; Nachtkamp, Klaus; Schmalstieg, Lutz
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 coating composition which may be cured at elevated temperature and is based on A) a polyisocyanate component containing at least one organic polyisocyanate having reversibly blocked isocyanate groups and a molecular weight of 398 to 25,000 excluding the, weight of the blocking agent the isocyanate groups being, reversibly blocked with a secondary monoamine and B) an isocyanate reactive component containing at least one organic polyamine having a molecular weight of 60 to 499 and at least two primary amino groups. The present invention also relates to the use of these coating compositions for the formation of coatings on heat resistant substrates.
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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 June 21, 1990 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2012.
- 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.