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Expired Canadian patentCanada

Lightning protection method and device using a mixture of active and passive plasmas

CA 2561631 C · Owner: Li, Xiaobin · Inventors: Wang, Kunsheng; Li, Xiaobin

CIPO record

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Abstract From the Canadian patent

A lightning protection method uses a mixture of active and passive plasmas. When the strength of an electrical field is detected by a lightning warning signal unit to reach an alarm limit, the unit sends a signal to start an active , plasma generation unit and an air flow source unit. The air flow source unit feeds air or other suitable gases to the active plasma generation unit and via a plasma piping in each lightning rod blows out the high-density plasma generated by the active plasma generation unit at the tip(s) of lightning rod unit. Under the action of the electric field of the lightning cloud the , single or , multi-tip lightning rod unit passively forms a corona discharge …

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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

  • Filed January 27, 2005 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 27, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • 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 27, 2005
GrantedJanuary 10, 2012
Term endedJanuary 27, 2025
Patent numberCA 2561631 C
Classification (IPC)H01T23/00 +1 more

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedJan 27, 2005Patent grantedJan 10, 2012Term endedJan 27, 2025

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