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Expired Canadian patentCanada

Process and apparatus for electrolysis

CA 1059942 A · Owner: Hooker Chemicals And Plastics Corp. · Inventors: Cook, Edward H. (Jr.); Emery, Alvin T.

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Abstract From the Canadian patent

An electrolytic cell suitable for use in electrolyzing, alkali metal halide brines which comprises a cell body having an, anode compartment containing an anode a cathode compartment con-, taining a cathode and at least one buffer compartment between said anode and cathode compartments, said compartments being separated from each other by a carrier located between the anode and buffer compartments, cathode and buffer compartments and between individual buffer compartments, said barrier being substantially impervious to fluids and gases, selected from a hydrolyzed copolymer of tetrafluoroethylene and a sulfonated perfluorovinyl ether having the formula:, FSO2CF2CF2OCF(CF3)CF2OCF=CF2 said …

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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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
  • 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—
GrantedAugust 7, 1979
Term endedAugust 7, 1996
Patent numberCA 1059942 A
Classification (IPC)C25B13/08 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 7, 1979Term endedAug 7, 1996

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