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Expired Canadian patentCanada

Breaking oil-in-water emulsion using porous iron electrode

CA 1102275 A · Owner: Ford Motor Company Of Canada, Limited · Inventors: Weintraub, Marvin H.; Dzieciuch, Matthew A.; Gealer, Roy L.

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Abstract From the Canadian patent

A method is disclosed for breaking an oil-inwater emulsion. Briefly, the method of this invention includes the following general steps. A porous ferrous ion producing anode is established. A supply of the oilin-water emulsion is located on one side of the anode and a fixed volume of the emulsion is flowed through a fixed cross sectional area of the anode per unit of time. Less than a passivating current is flowed through each unit area of the anode per unit of time thereby dissolving into the emulsion ferrous ion in sufficient quantity to break the emulsion. The flowing of the fixed volume of the emulsion through the electrode per unit of time and the dissolving of sufficient quantity of …

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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 June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 10, 1977
GrantedJune 2, 1981
Term endedJune 2, 1998
Patent numberCA 1102275 A
Classification (IPC)C02F1/46 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedNov 10, 1977Patent grantedJune 2, 1981Term endedJune 2, 1998

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