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Expired Canadian patentCanada

Vaned anode or high-intensity ionizer stage of electrostatic precipitator

CA 1083497 A · Owner: Electric Power Research Institute · Inventors: Satterthwaite, Dale J.

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

An improved electrode assembly for a high-intensity ionizer array utilized as the first stage in a twostage electrostatic precipitator. Each ionizer unit employs a pair of co-axial electrodes to create a high-intensity electric field across the path of a particulate-laden gas stream. As the gas passes through the field it is intensely ionized and the particulate becomes highly charged. The ionizer anode comprises a venturi diffuser through which the gas stream flows immediately prior to entry into a precipitator stage which removes the charged particles. The ionizer cathode is a disk co-axially mounted within the venturi throat and having an arcuate periphery. A high voltage power supply …

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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 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 1997.
  • 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 12, 1977
GrantedAugust 12, 1980
Term endedAugust 12, 1997
Patent numberCA 1083497 A
Classification (IPC)B03C3/41 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedSep 12, 1977Patent grantedAug 12, 1980Term endedAug 12, 1997

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