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Expired Canadian patentCanada

Method for catalyzing a fuel cell electrode and an electrode so produced

CA 1045677 A · Owner: United Technologies Corporation · Inventors: Katz, Murray; Kaufman, Arthur

CIPO record

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Abstract From the Canadian patent

The disclosure teaches a process for introducing a soluble, catalyst-containing material into a conducting particle, hydrophobic-bonded electrochemical cell electrode. The process includes the step of dissolving the soluble catalyst-containing material in a liquid solution of dissimilar liquids which liquid solution has the following characteristics: It is capable of wetting the hydrophobic bonding material of the electrode at a first composition range of the liquids. It is incapable of wetting the hydrophobic bonding material at a second composition range of the liquids; and it is capable of changing from the first composition range to the second composition range on evaporation of the …

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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 January 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 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—
GrantedJanuary 2, 1979
Term endedJanuary 2, 1996
Patent numberCA 1045677 A
Classification (IPC)H01M4/88

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJan 2, 1979Term endedJan 2, 1996

Sources & verification

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