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Expired Canadian patentCanada

Air-metal cell with constant interelectrode spacing

CA 1087681 A · Owner: Accumulatorenwerk Hoppecke Carl Zoellner & Sohn · Inventors: Ruch, Jean; Hasenauer, Dieter

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A device for production of high outputs and efficiencies with high current densities in an electrochemical system, particularly a metal - air cell compris-, ing a consumable electrode, an air electrode an electrolyte, disposed in an electrolyte space and current take-off. The The consumable electrode has a rod-shape spacial form made at least partially of compact metal, the consumable electrode having a front face constituting a sole working surface and projects sealed in the electrolyte space. An air electrode is spaced by the smallest distance parallel to the working surface of the consumable electrode, and an adjustable mounting for one of the electrodes, particularly the consumable …

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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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 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.
FiledFebruary 9, 1977
GrantedOctober 14, 1980
Term endedOctober 14, 1997
Patent numberCA 1087681 A
Classification (IPC)H01M12/02 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedFeb 9, 1977Patent grantedOct 14, 1980Term endedOct 14, 1997

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.