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Expired Canadian patentCanada

Method and apparatus for separating dispersed matter from a fluid medium

CA 1056901 A · Owner: Yeh, George C. · Inventors: Yeh, George C.

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

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Abstract From the Canadian patent

Herein are disclosed a method and apparatus whereby dispersed matter in the form of finely-divided particles and/or in the form of molecular species such as molecules atoms and radicals, are separated from a gaseous or liquid medium. A fluid medium containing dispersed matter is subjected to a field of a corona discharge from a first electrode (hereinafter referred to as a "separating electrode") which is pervious to the passage of the fluid medium and dispersed matter, whereby particles are charged if not already charged and molecular species are ionized if not already ionized in, the same electrical polarity as that of the charge on the separating electrode, and the dispersed matter is …

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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 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 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—
GrantedJune 19, 1979
Term endedJune 19, 1996
Patent numberCA 1056901 A
Classification (IPC)H01T1/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJune 19, 1979Term endedJune 19, 1996

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