Steel article having heavy-duty anticorrosive coating
CA 1287277 C · Owner: Suzuki, Kazuyuki · Inventors: Ishida, Masami; Shindou, Yoshio; Ohtsuki, Fuyuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heavy-duty anticorrosive coating is formed on a steel article by subjecting all or a part of the surface of a steel article to a pretreatment and then forming a polyurethane coating thereon. The coating is formed by reacting a mixture comprising as the main components (a) a polyol having the main chain composed solely of carbon atoms and hydrogen atoms and containing at least two hydroxyl groups in the molecule and (b) an organic polyisocyanate compound, and an optional organic compound capable of reacting with the polysocyanate compound (b). Preferably the polyurethane-forming mixture is composed of (a) the polyol, (b) the polyisocyanate compound (c) an optional polyol, other than the …
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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
- Granted August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
- 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.