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Expired Canadian patentCanada

Method and system of geophysical exploration

CA 1314334 C · Owner: Rai, Chandra Shekhar · Inventors: Sondergeld, Carl H.; Rai, Chandra Shekhar

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Abstract From the Canadian patent

A system and method of geophysical exploration is described whereby composition logs of the minerals comprising the formations surrounding a wellbore can be obtained. Samples of the formations surrounding a wellbore are obtained at selected intervals along the length of the wellbore. Each of the core samples is irradiated with electromagnetic radiation and a spectral response signal, representative of the electromagnetic response of each sample to the electromagnetic radiation is recorded. Peaks in the spectral response signals are located and correlated with minerals exhibiting similar electromagnetic characteristic response peaks. Since the samples were obtained from known depths within …

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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 March 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 9, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 20, 1989
GrantedMarch 9, 1993
Term endedMarch 9, 2010
Patent numberCA 1314334 C
Classification (IPC)G01V3/12 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJuly 20, 1989Patent grantedMarch 9, 1993Term endedMarch 9, 2010

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