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Expired Canadian patentCanada

Method and apparatus for sealing a pipeline leak

CA 1078306 A · Owner: Team · Inventors: Harrison, George W.; Moore, Billie G.

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

In one exemplar embodiment a method and appara-, tus are provided for sealing leaks which occur at the flanged connections of pipelines wherein a wire is wrapped about the upper surface of the flange connecting bolts for filling the gap between the flanges and above the bolts an injection valve means is installed for relieving pressure from inside the gap while the wire is being wrapped and for injecting a sealant to the interior of the gap beneath the wire wrap, and a sealant is provided for filling the gap beneath the wire wrap for stopping the leak and combining with the wire wrap to provide a permanent repair for the leak.

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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 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMay 27, 1980
Term endedMay 27, 1997
Patent numberCA 1078306 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMay 27, 1980Term endedMay 27, 1997

Sources & verification

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