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Expired Canadian patentCanada

Correction of nmr artifacts due to constant-velocity axial motion and spin-lattice relaxation

CA 2576991 C · Owner: Kruspe, Thomas · Inventors: Kruspe, Thomas; Thern, Holger F.; Blanz, Martin

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Abstract From the Canadian patent

NMR spin echo signals are corrected for axial motion of the borehole logging tool. An additional correction may be applied to correct for incomplete polarization of nuclear spins due to an insufficient wait time between pulse sequences.

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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 August 11, 2005 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 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.
FiledAugust 11, 2005
GrantedJuly 23, 2013
Term endedAugust 11, 2025
Patent numberCA 2576991 C
Classification (IPC)G01V3/32

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedAug 11, 2005Patent grantedJuly 23, 2013Term endedAug 11, 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.