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Expired Canadian patentCanada

Electrochemical cell having a alkali metal nitrate electrode

CA 1193653 A · Owner: The Government Of The United States Of America As Represented By The United States Department Of Energy · Inventors: Roche, Michael F.; Preto, Sandra K.

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

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Abstract From the Canadian patent

A power producing secondary electrochemical cell includes a molten alkali metal as the negative electrode material and a molten nitrate salt as the positive electrode material. The molten material in the respective electrodes are separated by a solid barrier of alkali metal ion conducting material. A typical cell includes active materials of molten sodium separated from molten sodium nitrate and other nitrates in mixture by a layer of sodium .beta." alumina.

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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 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 5, 1983
GrantedSeptember 17, 1985
Term endedSeptember 17, 2002
Patent numberCA 1193653 A
Classification (IPC)H01M4/36 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedApril 5, 1983Patent grantedSep 17, 1985Term endedSep 17, 2002

Sources & verification

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