Electrolytically tin-plating steel, remelting and alkaline cathodic treating
CA 1138373 A · Owner: Nippon Kokan Kabushiki Kaisha · Inventors: Watanabe, Toyofumi; Kojima, Masayuki; Takano, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrolytic tin-plated steel sheet excellent in long-term paint adhesion and a process for manufacturing same in which a steel sheet is subjected to an electrolytic tin plating treatment to form a tin plating layer thereon then, the resultant tin plating layer is subjected to a remelting treatment to produce noncrystallized tin oxides on the plating layer. The resultant noncrystallized tin oxides are subjected to a cathodic electrolytic treatment to eliminate by, reduction, tin oxides which crystallize into tetragonal .alpha.-Sno and tetragonal SnO2 on heating at the time of painting and baking so as to leave only a tin oxide which crystallizes into orthorhombic SnO on heating at 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 December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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
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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.