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Expired Canadian patentCanada

Wet scrubber apparatus with contact element removal

CA 1067393 A · Owner: American Air Filter Company · Inventors: Onnen, James H.

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

In an improved wet scrubbing apparatus for mutual contact of fluids wherein the fluids pass through a contact zone and fluid contact elements are continuously cycled between the contact zone and an element treating zone where they are treated with a treating fluid and forced from the element treating zone back into the contact zone, the improvement being a contact element removal section disposed within the cycling area of the contact elements whereby undersized elements are removed during operation of the apparatus.

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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 December 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedDecember 4, 1979
Term endedDecember 4, 1996
Patent numberCA 1067393 A
Classification (IPC)B01D46/38 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 4, 1979Term endedDec 4, 1996

Sources & verification

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