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Expired Canadian patentCanada

Solid bromine complexers

CA 1278823 C · Owner: Grimes, Patrick G. · Inventors: Grimes, Patrick G.

CIPO record

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Abstract From the Canadian patent

The cell of the invention comprises a housing, a zinc or cadmium anode, a chemically non-reactive counterelectrode and cathodic halogen. The cathodic halogen is selected from chlorine and bromine and preferably is bromine. The cell also is provided with an aqueous metal halide containing electrolyte in which the metal ions are of the same metal as the metal of the anode and halide anions are of the same halogen as the cathodic halogen material. Importantly in the, present invention, anion exchange resins provide a convenient means for storing the halogen generated during charging of the cell and providing a source of halogen to be used in the discharge of the cell.

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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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 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.
FiledOctober 2, 1986
GrantedJanuary 8, 1991
Term endedJanuary 8, 2008
Patent numberCA 1278823 C
Classification (IPC)H01M12/08 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedOct 2, 1986Patent grantedJan 8, 1991Term endedJan 8, 2008

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