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Expired Canadian patentCanada

Anodes for cathodic protection

CA 1235088 A · Owner: Raychem Corporation · Inventors: Stratfull, Richard F.

CIPO record

Overview

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

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Abstract From the Canadian patent

Novel anodes for cathodic protection systems comprise a plurality of elongate strands which are joined together to form an open flexible mesh. At least some of the strands are electrically conductive and comprise carbonaceous material which provides at least part of the electrochemically active surface of the anode. For example, the strands can consist of or contain carbon fibers and/or conductive polymer elements. The novel anodes are particularly useful for the cathodic protection of reinforcing bars in concrete structures.

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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 April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 12, 1984
GrantedApril 12, 1988
Term endedApril 12, 2005
Patent numberCA 1235088 A
Classification (IPC)C23F13/02 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedDec 12, 1984Patent grantedApril 12, 1988Term endedApril 12, 2005

Sources & verification

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