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Expired Canadian patentCanada

Lead chloride cathode and method of making same for use in seawater battery

CA 1069173 A · Owner: Ultra Electronics (Components) Limited · Inventors: Burant, Leonard J.

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Abstract From the Canadian patent

A lead chloride cathode suitable for use in seawater batteries comprises a supporting electrically conductive grid to which lead chloride is applied by dipping the grid in a molten lead chloride bath. The grid is preferably made of mesh or expanded metal, and after allowing the lead chloride to solidify, a conductive matrix is formed in the cathode by inserting it in a salt solution and partially discharging it to form electrically conductive lead pathways within the cathode adjacent the points at which the grid material is closest to the surface and the grid itself. The preferred method comprises dipping the mesh or grid material in molten lead chloride, removing the grid and the adhering …

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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 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.
Filed—
GrantedJanuary 1, 1980
Term endedJanuary 1, 1997
Patent numberCA 1069173 A
Classification (IPC)H01M6/34 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 1, 1980Term endedJan 1, 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.