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Expired Canadian patentCanada

Plasma fired feed nozzle

CA 1302518 C · Owner: Westinghouse Electric Corporation · Inventors: Dighe, Shyam Vasant; Wolf, Charles Bernard

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

9 53,093, ABSTRACT OF THE DISCLOSURE, A plasma feed nozzle 3 for a furnace 1 which has a tubular mixing chamber 7 open at one end to the furnace a plasma torch 13 which provides superheated gases axially to the central portion of the mixing chamber 7 shroud, gases which enter the end of the mixing chamber opposite the end open to the furnace in such a way as to swirl as it moves axially through the mixing chamber 7 to provide a temperature profile which is substantially hotter in the central portion of the mixing chamber 7 than adjacent the wall portion thereof and a particulate feed nozzle 25 disposed to direct particulate material to the central portion of the mixing chamber.

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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 June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2009.
  • 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 6, 1988
GrantedJune 2, 1992
Term endedJune 2, 2009
Patent numberCA 1302518 C
Classification (IPC)H05H1/34 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 6, 1988Patent grantedJune 2, 1992Term endedJune 2, 2009

Sources & verification

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