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Expired Canadian patentCanada

Corona discharge treating system

CA 1287866 C · Owner: Tsutsui, Koichi · Inventors: Tsutsui, Koichi; Ikeda, Shoji

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

A corona discharge treating system wherein in order that the corona discharge treatment can be performed efficiently and securely on any product of complicated shape having a large number of different faces to be treated, the system is equipped with conveying means for conveyance of the article, a plurality of discharge electrodes are disposed along the conveying direction of the article, each of these discharge electrodes performs activation of a part of the surface to be treated by sharing, the whole surface to be treated can be activated when said article has passed through all these discharge electrodes, thereby enabling the surface treatment to be continuously made, while conveying the …

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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 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 12, 1986
GrantedAugust 20, 1991
Term endedAugust 20, 2008
Patent numberCA 1287866 C
Classification (IPC)B29C59/10

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJune 12, 1986Patent grantedAug 20, 1991Term endedAug 20, 2008

Sources & verification

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