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Expired Canadian patentCanada

Electrokinetic transducing methods and apparatus and systems comprising or utilizing the same

CA 1332435 C · Owner: Zenion Industries, Inc. · Inventors: Lee, Jimmy Luther

CIPO record

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Abstract From the Canadian patent

Electrokinetic transducing methods and systems are disclosed in which the two electrode arrays confront each other and each electrode in one array is equidistant from the two nearest electrodes in the other array. The electrode arrays are excited by pulsed exciting voltages the individual pulses of which are preferably all negative or all positive, have durations equal to or less than the pulse intervals, and have rounded leading knees. Embodiments of the invention are disclosed for applications including electrokinetic loudspeakers ion gener-, ators, fans, and electrostatic precipitators.

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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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 31, 1988
GrantedOctober 11, 1994
Term endedOctober 11, 2011
Patent numberCA 1332435 C
Classification (IPC)H02N1/04 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 31, 1988Patent grantedOct 11, 1994Term endedOct 11, 2011

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