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Expired Canadian patentCanada

Water separation cell for removing the reaction water from the electrolyte of fuel cells and fuel cell batteries

CA 1068777 A · Owner: Siemens Aktiengesellschaft · Inventors: Deinzer, Michael; Grave, Burghard; Gutbier, Heinrich

CIPO record

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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 water separation cell for removing the reaction water from the electrolyte of fuel cells and fuel cell batteries which comprise a liquid chamber bounded on at least one side by a porous diaphragm and, a gas chamber bounded by the diaphragm and a condensation surface adapted for cooling, in which the liquid chamber is subdivided into two chambers of different size which are arranged on top of each other with the upper larger chamber serving as the electrolyte space and the lower smaller, chamber taking up the condensate which passes through the porous diaphragm into this chamber due to the pressure of a gas present in the gas chamber.

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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 December 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 25, 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—
GrantedDecember 25, 1979
Term endedDecember 25, 1996
Patent numberCA 1068777 A
Classification (IPC)H01M8/04

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 25, 1979Term endedDec 25, 1996

Sources & verification

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