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Expired Canadian patentCanada

Elimination of the anisotropy effect in lwd azimuthal resistivity tool data

CA 2591640 C · Owner: Wang, Tsili · Inventors: Yu, Liming; Wang, Tsili; Signorelli, Jack

CIPO record

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

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Abstract From the Canadian patent

Cross-component measurements made with a dual-transmitter configuration are processed to estimate a distance to an interface in an anisotropic earth formation. Optionally, measurements may be made with two receivers also in , the dual transmitter configuration.

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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

  • Filed December 13, 2005 and granted September 8, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • 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 13, 2005
GrantedSeptember 8, 2015
Term endedDecember 13, 2025
Patent numberCA 2591640 C
Classification (IPC)G01V3/28

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedDec 13, 2005Patent grantedSep 8, 2015Term endedDec 13, 2025

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