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Expired Canadian patentCanada

Recovery of zinc from zinc chloride by fused salt electrolysis

CA 1062194 A · Owner: United States Department Of Commerce National Technical Information Serv Ice · Inventors: Shanks, Donald E.; Haver, Frank P.

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Abstract From the Canadian patent

Metallic zinc is recovered from zinc chloride by electrolysis of a molten mixture of zinc chloride and an electrolyte consisting essentially of lithium chloride and potassium chloride. The electrolyte preferably consists of the LiCl-KCl eutectic mixture consisting of 59 mole percent LiCl and 41 mole percent KCl.

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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 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 11, 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—
GrantedSeptember 11, 1979
Term endedSeptember 11, 1996
Patent numberCA 1062194 A
Classification (IPC)C25C3/34

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 11, 1979Term endedSep 11, 1996

Sources & verification

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