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Expired Canadian patentCanada

Process and apparatus for use with pressurized reactors

CA 1339294 C · Owner: Lipp, Charles W. · Inventors: Lipp, Charles W.

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

A process burner (10) for the partial oxidation of a carbonaceous slurry has three concentric conduits (23,28,26) defining a central passageway (27) a middle, annular passageway (25) and a frusto-conical passageway. The discharge ends of the central and middle passageways (27,25) lie in substantially the same plane and an acceleration conduit (33) extends the frusto-conical passageway downstream. The slurry is passed through the middle passageway (25) and oxygen-containing gas is passed through the central and frusto-conical passageways with 70-95 weight percent of said gas passing through the frusto-conical passageway. Preferably the acceleration conduit forms a smooth curving surface …

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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 August 19, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2014.
  • 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 18, 1989
GrantedAugust 19, 1997
Term endedAugust 19, 2014
Patent numberCA 1339294 C
Classification (IPC)F23D17/00 +1 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedMay 18, 1989Patent grantedAug 19, 1997Term endedAug 19, 2014

Sources & verification

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