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Expired Canadian patentCanada

Method and system for absolute activity determination of radionuclides

CA 1106505 A · Owner: Instytut Badan Jadrowych · Inventors: Pochwalski, Krzysztof K.; Radoszewski, Tomasz E.

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Abstract From the Canadian patent

A method and apparatus for absolute activity determination of radionuclides, especially of low maximum energy pure beta-emitters as for instance 3H, 63Ni, 14C, 35S. The application of the invention can also be extended for activity determinations of other radionuclides for example, of those disintegrating through the electron capture. The method contemplates producing pulses of various multiples of coincidence simultaneously and, correlating the counts of the pulses to obtain a measure of the absolute activity. This is achieved by providing a scintillation head containing at least three photomultipliers optically coupled to the scintillator and the source whose activity is to be measured. …

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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 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1998.
  • 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 16, 1978
GrantedAugust 4, 1981
Term endedAugust 4, 1998
Patent numberCA 1106505 A
Classification (IPC)H05G1/00 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 16, 1978Patent grantedAug 4, 1981Term endedAug 4, 1998

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