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Expired Canadian patentCanada

Controlling respiratory disease-causing bacteria in water recirculating systems

CA 1284098 C · Owner: Swift, Thomas Richard · Inventors: Swift, Thomas Richard; Desty, Dennis Henry

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

A water recirculating system in which (a) water is continuously re-circulated through the system for the prime purpose of causing evaporation from the circulating water; and (b) such water is caused during its flow through an open part of said system, through which part atmospheric air may flow, to impinge on one or more solid surfaces whereby to increase the free water surface area available for evaporation and at a speed sufficient to release small water droplets from the water flow into the surrounding atmosphere. The system includes in serial relation with the water flow path a decontamination means, which comprises a chamber through which the circulating water may flow, and in which …

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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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 30, 1986
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284098 C
Classification (IPC)F24F6/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 30, 1986Patent grantedMay 14, 1991Term endedMay 14, 2008

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