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Expired Canadian patentCanada

Sludge removal device for cleaning the tubular plate of a steam generator

CA 1237349 A · Owner: Framatome · Inventors: Lebouc, Bernard

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

Sludge removal device for cleaning the tubular plate of a steam generator, The device comprises at least one assembly insertable in the enclosure through a hole situated in the vicinity of the tubular plate. Said assembly comprises a suction pipe having a curved part insertable in the casing through the hole and of a shape such that it terminates in the immediate vicinity of the plate, between the enclosure and the stack of tubes and a conduit placed inside the pipe, for connection to a cleaning liquid supply, ending in a nozzle for projecting water in a transverse direction to the pipe, along a grazing path with respect to the tubular plate and in the circumferential direction of 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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 1, 1985
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237349 A
Classification (IPC)F22B37/54 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedNov 1, 1985Patent grantedMay 31, 1988Term endedMay 31, 2005

Sources & verification

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