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Expired Canadian patentCanada

Method of preparing fine-particle high-loaded coal-water slurry and equipment for preparing the same

CA 1279477 C · Owner: Kawasaki Jukogyo Kabushiki Kaisha · Inventors: Kanamori, Toshiaki; Fujimoto, Harumi; Hagiwara, Tatsuo

CIPO record

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Abstract From the Canadian patent

A method of preparing fine-particle high loaded coal-water slurry and equipment for preparing the same. Slurry flowing out from a first stage mill is supplied to a second stage mill so as to be ground therein after almost all coarse particles have been substantially removed therefrom.

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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 January 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 14, 1986
GrantedJanuary 29, 1991
Term endedJanuary 29, 2008
Patent numberCA 1279477 C
Classification (IPC)C10L1/32 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 14, 1986Patent grantedJan 29, 1991Term endedJan 29, 2008

Sources & verification

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