Water-thinnable two-component coating preparation, a process for its preparation, and its use
CA 2092157 A1 · Owner: Hoechst Aktiengesellschaft · Inventors: Walz, Gerd; Frank, Udo; Schwab, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: Water-thinnable two-component coating preparation a, process for its preparation, and its use Water-thinnable two-component coating preparation comprising, a) a polyisocyanate component comprising one or more organic polyisocyanates, and, b) a polyurethane resin prepared by 1. reacting, (A) polyisocyanates with, (B) polyols having an average molecular weight Mn of at least 400, (C) optionally low molecular weight polyols and, (D) compounds having at least two groups which are reactive toward isocyanate groups and at least one group which is capable of anion formation, to give a prepolymer containing free NCO groups and, 2. reacting the prepolymer prepared in step …
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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 March 22, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2015.
- 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.