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Expired Canadian patentCanada

Active material for cathode of lead storage battery

CA 1210807 A · Owner: Mitsui Mining & Smelting Co. Ltd. · Inventors: Sumida, Morimasa; Miyazaki, Kazuhide

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Abstract From the Canadian patent

Active Material for Cathode, of Lead Storage Battery Abstract of the disclosure:, An active material for the cathode or positive pole of a lead storage battery the active, material being prepared either by adding at least one additive selected from bismuth, bismuth compounds thallium and thallium compounds to at least one base material selected from lead powder or lead oxide powder or by mixing and kneading at least one member selected from lead and lead oxide powder, with bonding watercontaining lead oxide powder. In one embodiment this, invention relates to a lead storage battery using therein said active material which is improved in availability of electric energy therefrom.

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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 September 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 9, 1984
GrantedSeptember 2, 1986
Term endedSeptember 2, 2003
Patent numberCA 1210807 A
Classification (IPC)H01M4/20

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedApril 9, 1984Patent grantedSep 2, 1986Term endedSep 2, 2003

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