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Expired Canadian patentCanada

Particle sorting method and apparatus

CA 1212357 A · Owner: Cra Exploration Pty. Limited · Inventors: Stone, Alan M.; Boyle, Alan; Haukins, Albert P.

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Abstract From the Canadian patent

TITLE - "PARTICLE SORTING METHOD AND APPARATUS" ABSTRACT, Selection means is provided for particles following a free flight trajectory path, those particles having a preselected characteristic, such as flourescence under x-ray bombardment, being detected and a signal being transmitted on such detection to electrostatic charging means to locally ionize the atmosphere and thereby charge the detected particle as it passes through the locally ionized atmosphere the charged particle being deflected from its free flight trajectory path by an electric field. Non-detected and uncharged particles continue in the free flight trajectory path. Particles may be detected in a path having lateral spread …

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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 7, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 3, 1983
GrantedOctober 7, 1986
Term endedOctober 7, 2003
Patent numberCA 1212357 A
Classification (IPC)B03B1/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedAug 3, 1983Patent grantedOct 7, 1986Term endedOct 7, 2003

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