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Expired Canadian patentCanada

Metallic sulfide additives for positive electrode material within a secondary electrochemical cell

CA 1058284 A · Owner: The Government Of The United States As Represented By The United Statedepartment Of Energy · Inventors: Koura, Nobuyuki; Mcpheeters, Charles C.; Yao, Neng-Ping

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An improved active material for use within the positive electrode of a secondary electrochemical cell includes a mixture of iron disulfide and a sulfide of a polyvalent metal. Various metal sulfides, particularly sulfides of cobalt, nickel, copper, cerium and manganese are added in, minor weight proportion in respect to iron disulfide for improving the electrode performance and reducing current collector requirements.

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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 July 10, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 10, 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—
GrantedJuly 10, 1979
Term endedJuly 10, 1996
Patent numberCA 1058284 A
Classification (IPC)H01M10/39

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJuly 10, 1979Term endedJuly 10, 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.