Method of manufacture of electric resistors from a metal sheet fixed on an insulating support
CA 1083080 A · Owner: Societe Francaise De L'Electro-Resistance · Inventors: Simon, Paul R. F.; Legrives, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method of manufacture of resistors from a sheet of metal or metal alloy fixed on an insulating support in which an insulating, mask having windows or grooves is applied against the sheet and the assembly is placed within an electrolytic cell in order to remove the metal or alloy opposite to the windows or grooves. The method comprises the following steps: (a) applying a layer of conductive material on an insulating support the sheet, of metal or alloy covered with the insulating mask being then applied on the said layer; (b) subjecting the sheet which is covered with the insulating mask and applied on the said layer of conductive material to a stream of electrolyte adjusted …
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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 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 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.