Production of aluminum foil capacitor electrodes
CA 1252061 A · Owner: Sprague Electric Company · Inventors: Nguyen, Trung H.; Hutchins, Clinton E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Etched and cleaned low voltage aluminum foil is subjected to a thermal treatment at about 595° to 650°C and then anodized in an adipate formation electrolyte which may contain a minor amount of a phosphate salt or a final, reanodization may be carried out in a phosphate electrolyte.
Read the whole patent
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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.