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Expired Canadian patentCanada

Glow discharge generating apparatus

CA 1201156 A · Owner: Tokyo Shibaura Denki Kabushiki Kaisha · Inventors: Satoh, Saburoh; Horii, Kenji; Akiyama, Hidenori

CIPO record

Overview

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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, A glow discharge generating apparatus comprises in a glow discharge chamber, an anode, a cathode for generating a glow discharge between the cathode and the anode upon application of a negative pulse and a, triggering electrode for starting the glow discharge. To stabilize the glow discharge the electron density, distribution in the vicinity of the surface of the cathode is made uniform only during at least part of a continuous period of the glow 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

  • Granted February 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 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.
FiledMarch 9, 1983
GrantedFebruary 25, 1986
Term endedFebruary 25, 2003
Patent numberCA 1201156 A
Classification (IPC)H01S3/09 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMarch 9, 1983Patent grantedFeb 25, 1986Term endedFeb 25, 2003

Sources & verification

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