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Expired Canadian patentCanada

Technique for determining properties of earth formations using dielectric permittivity measurements

CA 2558909 C · Owner: Habashy, Tarek · Inventors: Hizem, Mehdi; Boyd, Austin; Habashy, Tarek

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Abstract From the Canadian patent

Techniques for determining formation characteristics use measurements of dielectric permittivity at a number of frequencies. Determined characteristics include the vertical and horizontal formation dielectric constant and conductivity the formation water conductivity, the water saturation the cementation and the saturation exponents. In laminated formations these profiles can be determined for each lamina. Also formation dielectric properties are used in determination of the rock type.

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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 September 7, 2006 and granted April 5, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2026.
  • 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.
FiledSeptember 7, 2006
GrantedApril 5, 2016
Term endedSeptember 7, 2026
Patent numberCA 2558909 C
Classification (IPC)G01V3/30

Timeline

Timeline From CIPO dates

2007200920112013201520172019202120232025Application filedSep 7, 2006Patent grantedApril 5, 2016Term endedSep 7, 2026

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