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Expired Canadian patentCanada

Measurement of gamma-ray energy due to thermal neutron capture of copper and nickel

CA 1162328 A · Owner: Mobil Oil Corporation · Inventors: Givens, Wyatt W.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract, A source of fast neutrons is pulsed to irradiate the formations surrounding a borehole with neutrons to produce gamma-rays from thermal neutron capture of the metallic materials located within the formations. Such gamma-rays are detected as an indication of the presence of such materials within the formations.

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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 February 14, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 7, 1981
GrantedFebruary 14, 1984
Term endedFebruary 14, 2001
Patent numberCA 1162328 A
Classification (IPC)G01V5/10 +1 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedDec 7, 1981Patent grantedFeb 14, 1984Term endedFeb 14, 2001

Sources & verification

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