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Expired Canadian patentCanada

Metal/air batteries

CA 1286715 C · Owner: Connolly, Peter F. · Inventors: Hamlen, Robert P.; Connolly, Peter F.

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 metal/air battery having plural series connected cells, including a tank for holding a body of liquid electrolyte, and an electrically nonconductive frame carrying a plurality of air cathodes facing a common air chamber and a like plurality of anodes respectively juxtaposed to the cathodes outside the air chamber the, frame being removably insertable in the tank and engaging the tank wall, when inserted, so as to divide the tank into a plurality of separate and substantially electrically isolated electrolyte-holding zones each containing one anode-cathode pair. The anodes may have vertical slots to facilitate passage of electrochemical reaction products from the anode-cathode gaps. The …

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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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 10, 1986
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286715 C
Classification (IPC)H01M12/06 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 10, 1986Patent grantedJuly 23, 1991Term endedJuly 23, 2008

Sources & verification

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