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Expired Canadian patentCanada

Water slurry of carbonized substances, and process of manufacturing the same

CA 1297673 C · Owner: Masuda, Tsuneo · Inventors: Masuda, Tsuneo

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

An aqueous slurry of carbonized plant material is disclosed wherein the carbonized plant material is less than 50 microns particle size and the amount of water in the slurry is about 0.8 to 1.2 parts by weight per 1 part by weight carbonized material. Apparatus and method for the manufacture of the slurries are also disclosed. PAT 6379-1

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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 March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.
FiledMarch 26, 1986
GrantedMarch 24, 1992
Term endedMarch 24, 2009
Patent numberCA 1297673 C
Classification (IPC)C10L1/32 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMarch 26, 1986Patent grantedMarch 24, 1992Term endedMarch 24, 2009

Sources & verification

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