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Expired Canadian patentCanada

Organic siliconate additive for alkaline zinc electrochemical cells

CA 1236159 A · Owner: Rayovac Corporation · Inventors: Dopp, Robert B.

CIPO record

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Abstract From the Canadian patent

An alkaline electrochemical cell is disclosed which comprises an air cathode sub-assembly with means for supplying air to the sub-assembly, a zinc anode having an organic siliconate in contact therewith and an electrolyte in contact with the zinc anode. A non-metallic separator is disposed between the cathode and the anode. The capacity of the electrochemical cell of the invention is extended by the presence of the organic siliconate which lessens the effects of rate limitations originating in the zinc anode.

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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 May 3, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 17, 1984
GrantedMay 3, 1988
Term endedMay 3, 2005
Patent numberCA 1236159 A
Classification (IPC)H01M12/06 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedOct 17, 1984Patent grantedMay 3, 1988Term endedMay 3, 2005

Sources & verification

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