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Expired Canadian patentCanada

Procedure for detecting and locating the source of partial discharges in an electrical device

CA 2503077 C · Owner: Alstom Grid Sas · Inventors: Kuppuswamy, Raja; Louise, Sebastien; Nzihou, Niemet

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Abstract From the Canadian patent

Procedure for detecting and locating the source of partial discharges in an electrical device in an enclosure containing acoustically conductive fluid. It consists in: - positioning (31) acoustic detectors and acquiring the position of the detectors; - defining (35) groups of detectors having at least three detectors; - ensuring (37) that each group is free of triangles with summits made up of three detectors where at least one angle is out of a range of angles otherwise the group eliminated; - for each group that is not eliminated calculate (38) a position close to the source;~ - ensure (39) that each non-eliminated group is free of triangles with summits made up of two detectors in 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

  • Filed April 11, 2005 and granted May 28, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 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.
FiledApril 11, 2005
GrantedMay 28, 2013
Term endedApril 11, 2025
Patent numberCA 2503077 C
Classification (IPC)G01N29/14 +2 more

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2006200820102012201420162018202020222024Application filedApril 11, 2005Patent grantedMay 28, 2013Term endedApril 11, 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.