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Expired Canadian patentCanada

Process and system for detecting and measuring a tritium gas leak

CA 1262971 C · Owner: Thurlow, Norman C. · Inventors: Hruda, Robert M.; Thurlow, Norman C.

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Abstract From the Canadian patent

The present invention is a method and system for detecting and measuring a tritium gas leak. The method comprises collecting and concentrating any tritium gas escaping from a container in a reservoir over a predetermined time period. The concentrated gas sample is then directed to at least one of two detectors a highly sensi-, tive ion chamber or a highly sensitive proportional counter. The activity of the gas sample, as indicated by one or both of the detectors, is related to the concentration time interval to provide a measurement of sample activity accumulated per unit time. Calibration with a known tritium leak allows the sample activity per unit time to be read as a leak rate. 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 November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 13, 1987
GrantedNovember 14, 1989
Term endedNovember 14, 2006
Patent numberCA 1262971 C
Classification (IPC)G01M3/20 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedMay 13, 1987Patent grantedNov 14, 1989Term endedNov 14, 2006

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