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Expired Canadian patentCanada

Method of exploration for uranium and petroleum

CA 1268560 C · Owner: Hockman, Mark B.M. · Inventors: Hockman, Mark B.M.; Ypma, Peter J.M.

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Abstract From the Canadian patent

This invention relates to a method of exploration for minerals and petroleum using artificial thermoluminescence analysis methods. The method uses thermoluminescence analysis of crystalline sample to determine the proximity of the sample to a mineral or petroleum deposit. The method comprises first irradiating the sample with gamma-radiation so as to substantially fill crystal lattice traps within the sample, heating the sample from an ambient temperature to an elevated temperature, measuring the intensity of luminescent radiation at a plurality of glow peak temperatures and relating the luminescent intensities to luminescent intensities of reference samples having. known characteristics …

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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 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 22, 1987
GrantedMay 1, 1990
Term endedMay 1, 2007
Patent numberCA 1268560 C
Classification (IPC)G01N21/62 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedJan 22, 1987Patent grantedMay 1, 1990Term endedMay 1, 2007

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