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Expired Canadian patentCanada

Electrode

CA 1330575 C · Owner: Bohlin, Sven-Erik · Inventors: Bohlin, Sven-Erik; Bergman, Lars-Erik; Heiskanen, Pekka

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Disclosed is an electrode used for one pole in underwater transmission of high-voltage direct currrent an insulated, cable being used for the other pole such electrodes being adapted, to be stationary on the bottom of the sea to serve as the anode and the cathode, respectively, while the sea-water constitutes the electric conductor therebetween. What characterises the invention is that the electrode comprises at least one layer of a flexible electrically conductive material which preferably is resistant to chlorine-alkali, said layer being enclosed between protective structures of a flexible, mechanically resistant material which preferably is resistant to chlorine-alkali at least one, …

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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 July 5, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2011.
  • 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 30, 1989
GrantedJuly 5, 1994
Term endedJuly 5, 2011
Patent numberCA 1330575 C
Classification (IPC)H01R3/08 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 30, 1989Patent grantedJuly 5, 1994Term endedJuly 5, 2011

Sources & verification

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