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Expired Canadian patentCanada

Fast fluidized bed reactor

CA 1332497 C · Owner: Lundqvist, Ragnar · Inventors: Lundqvist, Ragnar; Sarkki, Juha; Hiltunen, Matti

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

In a fast fluidized bed reactor having in a lower region, downwardly and inwardly inclined walls a change in the direction, of the wall surface or a ledge or protrusion is provided to change the direction of the particles flowing downwardly adjacent the wall for directing the particles inwardly away from the wall and into the region acted on by the nozzles providing the fluidizing gas. The change of direction abutment or projection, is preferably provided along the refractory wall surface at an elevation 200-1100 mm above the grid plate. In this manner clogging of the nozzles is prevented and more efficient and effective fluidization and combustion processes occur.

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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 October 18, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 18, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 15, 1989
GrantedOctober 18, 1994
Term endedOctober 18, 2011
Patent numberCA 1332497 C
Classification (IPC)B01J8/24 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedAug 15, 1989Patent grantedOct 18, 1994Term endedOct 18, 2011

Sources & verification

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