Rapid curing, light stable, two-component polyurethane coating compositions
CA 2028882 A1 · Owner: Rosthauser, James W. · Inventors: Squiller, Edward P.; Markusch, Peter H.; Rosthauser, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo3311, PU-225, RAPID CURING, LIGHT STABLE TWO-COMPONENT, POLYURETHANE COATING COMPOSITIONS ABSTRACT OF THE DISCLOSURE, The present invention is directed to a process for the preparation of a polyurethane coating by a) preparing a coating composition having an improved potlife from, i) a compound containing at least two hydroxyl groups ii) a polyisocyanate containing aliphaticallycycloaliphatically- or araliphatically-bound isocyanate groups, iii) about 0.005 to 2.0 weight percent based on the, weight of components i) and ii) of a tin catalyst, and, iv) at least about 50 mole percent based on the tin, catalyst, of hydrogen chloride b) applying the coating composition to a substrate and c) …
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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 October 30, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.