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Expired Canadian patentCanada

Treating fluid matter

CA 1307650 C · Owner: Dodson, Christopher Edward · Inventors: Dodson, Christopher Edward

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

TREATING FLUID MATTER, (Figure 2) A bed 26 of particulate material is moved in a band continuously along an annular path by passing fluid media having both circumferential and vertical components through the bed along that path. The fluid media comprises combustion gases which are passed through the bed along a portion of the path for heating the particulate material as it passes therethrough and fluid matter to be heated which passes through the bed along another portion of its path such that the fluid matter is heated as it passes through the particulate material which has been heated by the combustion gases.

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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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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 21, 1988
GrantedSeptember 22, 1992
Term endedSeptember 22, 2009
Patent numberCA 1307650 C
Classification (IPC)B01J8/38 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 21, 1988Patent grantedSep 22, 1992Term endedSep 22, 2009

Sources & verification

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