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Expired Canadian patentCanada

Apparatus for mounting a primary electrode

CA 1110305 A · Owner: Johns-Manville Corporation · Inventors: Frese, Robert T. Jr.; Kroupa, Vladimir; Fineo, Carlo

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

Abstract of the Disclosure, A mounting assembly for a primary electrode in an open-top electric furnace whereby the primary electrode is supported in a working position and for servicing so that it may be readily moved out of the melt and off to a side of the furnace for convenient access. In addition a fixedly mounted clamp firmly securing the primary electrode in its working position and for transmitting electric power to the electrode is provided.

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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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 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.
FiledJanuary 16, 1979
GrantedOctober 6, 1981
Term endedOctober 6, 1998
Patent numberCA 1110305 A
Classification (IPC)C03B5/02 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJan 16, 1979Patent grantedOct 6, 1981Term endedOct 6, 1998

Sources & verification

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