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Expired Canadian patentCanada

Circulating air scrubber

CA 1316122 C · Owner: Burger, Thomas F. · Inventors: Collins, David Michael; Burger, Manfred R.; Burger, Thomas F.

CIPO record

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

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Abstract From the Canadian patent

Abstract, The invention relates to an ultrasonic circulating air brush scrubber with an ionization arrangement. The scrubber has equipment for the supply of a scrubbing liquid in finely dispersed form into the air stream and a, high-voltage ionization arrangement for ionization of the air stream. Downstream of the ionization arrangement at, least one circular brush is provided which can be driven at a high speed and which is charged with an opposite potential to the ionization arrangement. The circulating air scrubber is distinguished by very superior cleaning action with particle sizes down to below 1 µm and also by a very small consumption of scrubbing liquid. In addition the air exiting …

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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 April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 20, 1988
GrantedApril 13, 1993
Term endedApril 13, 2010
Patent numberCA 1316122 C
Classification (IPC)B01D53/34 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedApril 20, 1988Patent grantedApril 13, 1993Term endedApril 13, 2010

Sources & verification

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