Drawn and ironed cans with thin nickel coating and method of forming the cans
CA 1136075 A · Owner: National Steel Corporation · Inventors: Spencer, Edward P.; Smith, Edwin J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Seamless cans are drawn and ironed from steel sheet having a very thin coating of nickel on both sides. The steel may be flat rolled blackplate and the nickel may be plated onto the steel by drawing a continuous strip or sheet of the steel through a conventional electroplating bath to deposit the very thin nickel coating. The coated steel is cut into blanks which are drawn into cups, and the side wall of the cups are then ironed in the conventional manner to produce the desired thickness and height for the finished cans. The nickel coated steel may be chemically treated to increase storage life of the material before drawing and ironing. The drawn and ironed cans may also be chemically …
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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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 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
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.