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Expired Canadian patentCanada

Apparatus for generating air ions and an air ionization system

CA 1321237 C · Owner: Wilson, Robert Wilfred · Inventors: Wilson, Robert Wilfred

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

Abstract of the Disclosure An apparatus (10) for generating air ions. Nuclear air ionizers (14) are utilized which generate a multiplicity of ions of both positive and negative polarity by the bombardment of air molecules with radiation. An electric field is supplied in proximity to the nuclear air ionizers for generating an electrical field of alternating polarity near the source of generation of the multiplicity of ions. This combination creates waves of ions of opposite polarity which assist in moving the air ions away from the ionization source and preventing early recombination. An air ionization system for entire room or enclosure may be constructed utilizing a grid of a plurality of …

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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 10, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 10, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 13, 1988
GrantedAugust 10, 1993
Term endedAugust 10, 2010
Patent numberCA 1321237 C
Classification (IPC)H05F3/06 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJan 13, 1988Patent grantedAug 10, 1993Term endedAug 10, 2010

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