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Expired Canadian patentCanada

Electric arc reactor

CA 1323670 C · Owner: Ramakrishnan, Subramania · Inventors: Ogilvy, Ian Michael; Oppenlander, Walter Tilman; Mundy, Alan Edward

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

1-, ABSTRACT, "ELECTRIC ARC REACTOR", An electric arc reactor having a substantially straight feed material passage extending through both the anode and the cathode. Gas is fed into the gap between the two electrodes so as to swirl about the axis of the feed passage and thereby confine the lateral extent of the arc and also confine the location at which the upstream arc root attaches to the upstream electrode. An enlargement of the passage in the gap end of the upstream electrode provides an internal sloping root attachment surface. A similar enlargement may be provided in the downstream electrode, but spaced from the gap if the downstream electrode forms the cathode. Gas flow in a …

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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 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
  • 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 16, 1989
GrantedOctober 26, 1993
Term endedOctober 26, 2010
Patent numberCA 1323670 C
Classification (IPC)H05B7/18 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 16, 1989Patent grantedOct 26, 1993Term endedOct 26, 2010

Sources & verification

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