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Expired Canadian patentCanada

Highly active catalyst and highly active electrode made of this catalyst

CA 1306236 C · Owner: Yanmar Diesel Engine Co. Ltd. · Inventors: Hashimoto, Koji; Kanda, Toshihisa; Hashimoto, Koji

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Abstract From the Canadian patent

A highly active powder catalyst with a high concentration of platinum group elements prepared from an amorphous alloy consisting of at least one of valve metals, at least one of platinum group elements and balance being at least one element selected from Ni and Co by immersion in a hydrofluoric acid and a highly, active electrode prepared by using the above mentioned powder catalyst.

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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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 18, 1988
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306236 C
Classification (IPC)H01M4/90 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 18, 1988Patent grantedAug 11, 1992Term endedAug 11, 2009

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