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Expired Canadian patentCanada

Method of operating electrolytic diaphragm cells having horizontal electrodes

CA 1069462 A · Owner: Ppg Industries, Inc. · Inventors: Wiley, Daniel E.; Raetzsch, Carl W.

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

Disclosed is a method of operating an electrolytic cell divided into an anolyte chamber and a catholyte chamber by a substantially horizontal, permeable barrier. The anolyte chamber is above the permeable barrier while the catholyte chamber is below the permeable barrier. Electrolyte passes from the anolyte chamber through the permeable barrier to the catholyte chamber. An electrical current passes through the cell thereby evolving chlorine gas on the anode and hydrogen gas on the cathode. The electrical current is in excess of the unaided flow of electrolyte through the permeable barrier resulting in diminished cathode current efficiency and necessitating augmentation of the flow 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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
  • 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 8, 1980
Term endedJanuary 8, 1997
Patent numberCA 1069462 A
Classification (IPC)C25B9/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 8, 1980Term endedJan 8, 1997

Sources & verification

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