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Expired Canadian patentCanada

Heavy oil emulsified fuel combustion apparatus

CA 2231670 C · Owner: Mitsubishi Heavy Industries, Ltd. · Inventors: Ueda, Katsuyuki; Kikuchi, Hiroshi; Ichinose, Toshimitsu

CIPO record

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Abstract From the Canadian patent

A heavy oil emulsified fuel combustion apparatus is provided in which steam bubbles generated in the pressure reduction operation for dewatering a heavy oil emulsified fuel before combustion are prevented from mixing into a dewatered heavy oil side resulting in lowering of a dewatering efficiency. In a heavy oil emulsified fuel combustion boiler a heavy oil emulsified fuel 101 is heated by a heater 110 and dewatered by a flusher 120 and then introduced into a boiler for combustion and water 152 obtained by the dewatering is sent to a water utilizing system of the boiler. The heavy oil emulsified fuel 102 is heated in a high pressure and then introduced into a pressure reducing device 200 to …

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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

  • Filed March 10, 1998 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 10, 1998
GrantedMay 28, 2002
Term endedMarch 10, 2018
Patent numberCA 2231670 C
Classification (IPC)F23K5/20 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedMarch 10, 1998Patent grantedMay 28, 2002Term endedMarch 10, 2018

Sources & verification

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