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Expired Canadian patentCanada

Scrubber for the desulfurization of flue gases

CA 1209900 A · Owner: Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen G.M.B.H. & Co. Kommanditgesellschaft · Inventors: Stehning, Werner; Nusser, Horst D.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A scrubbing column for flue gases and especially power plant flue gases removes sulfur oxides by absorption in a calcium containing scrubbing liquid and is surmounted by a water separator which is subdivided into sectors readily traversed by the flue gas at the head of the column and around a central plenum. The passage around these sectors which is, connected with a radially offset flue gas outlet has a cross, section progressively increasing toward this outlet.

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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 August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 18, 1984
GrantedAugust 19, 1986
Term endedAugust 19, 2003
Patent numberCA 1209900 A
Classification (IPC)B01D53/18 +1 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJan 18, 1984Patent grantedAug 19, 1986Term endedAug 19, 2003

Sources & verification

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