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Expired Canadian patentCanada

Foam cleaning system for an electrostatic precipitator

CA 1102714 A · Owner: United Air Specialists, Inc. · Inventors: Spurgin, Wendell P.; Elsbernd, Carl A.

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

The foam cleaning system for an electrostatic precipitator includes a source of a suitable detergent and means for introducing it into a foamer, a source of supply water which is piped through a water pressure reducing valve if necessary and then through a pressure gauge and solenoid valve control and through a suitable filter into the foamer, and a supply of compressed air which passes by suitable conduit through an air pressure regulator and solenoid valve control into the foamer. The detergent water and air are suitably combined in the foamer and discharged therefrom as a foam into a manifold which will carry the foam to the electrostatic precipitators to be' cleaned. It is important …

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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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
  • 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 19, 1978
GrantedJune 9, 1981
Term endedJune 9, 1998
Patent numberCA 1102714 A
Classification (IPC)B03C3/78 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 19, 1978Patent grantedJune 9, 1981Term endedJune 9, 1998

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