Joining of flat surfaces by electric resistance welding
CA 1084594 A · Owner: Comitato Nazionale Per L'Energia Nucleare- Cnen · Inventors: Vercelli, Alessandro; Lelli, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for welding together two metal bodies along respective flat surfaces thereof by resistance welding one or more areas of said surfaces, comprising the steps; forming on one of the flat surfaces at the middle of each area to be welded, a tapered protuberance projecting from the surface the crests of the protuberances lying on a plane parallel to the flat surfaces; forming on the same surface on which the protuberances are provided or on the corresponding areas of the other surface a recess for each protuberance which recess has a capacity at least as large as the volume of that portion of the protuberance which projects from the respective surface of the body; bringing into contact …
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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 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 1997.
- 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.