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Expired Canadian patentCanada

Air electrode for electrochemical cells

CA 1068778 A · Owner: Siemens Aktiengesellschaft · Inventors: Hohne, Karl

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An air electrode for electrochemical cells particularly for fuel, cells with an alkaline electrolyte which contains silver coated carbon as the catalytic material in which the catalytic material also contains nickel hydroxide, the nickel content being up to about 2% by weight with the weight, ratio of silver to carbon preferably about 1 : 1.

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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 December 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 25, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedDecember 25, 1979
Term endedDecember 25, 1996
Patent numberCA 1068778 A
Classification (IPC)H01M4/90 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 25, 1979Term endedDec 25, 1996

Sources & verification

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