Patents by Inventor Radu Fechete

Radu Fechete has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Reduction of motion artifacts in NMR
    Patent number: 7180287
    Abstract: NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: February 20, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Peter Rottengatter, Holger Thern, Radu Fechete, Martin Blanz, Thomas Kruspe
  • NMR probe for material analysis
    Patent number: 7095230
    Abstract: In a unilateral NMR probe for the analysis of a material comprising at least one magnet for generating a constant time-invariant polarization field B0 in the material to be analyzed and current conductors forming a radio frequency oscillation circuit for generating a pulsed radio frequency magnetic excitation field B1 which is superimposed on the polarization field N0 in the material, the circuit conductors are so designed as to provide several adjacent excitation fields B0 with alternatingly oppositely oriented magnetic fields, whereby the current conductors generating each one of the excitation fields have a distance from each other which causes a certain penetration depth in the material to be analyzed and echoes received therefrom provide measurement values which are characteristic for the material being analyzed.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: August 22, 2006
    Inventors: Bernhard Blümich, Michael Bruder, Martin Klein, Karl-Heinz Krause, Michael Rabkin, Jürgen Stangenberg, Vladimir Anferov, Sophia Anferova, Radu Fechete
  • Reduction of motion artifacts in NMR
    Publication number: 20050248342
    Abstract: NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.
    Type: Application
    Filed: May 5, 2004
    Publication date: November 10, 2005
    Inventors: Peter Rottengatter, Holger Thern, Radu Fechete, Martin Blanz, Thomas Kruspe
  • NMR probe for material analysis
    Publication number: 20050040823
    Abstract: In a unilateral NMR probe for the analysis of a material comprising at least one magnet for generating a constant time-invariant polarization field B0 in the material to be analyzed and current conductors forming a radio frequency oscillation circuit for generating a pulsed radio frequency magnetic excitation field B1 which is superimposed on the polarization field N0 in the material, the circuit conductors are so designed as to provide several adjacent excitation fields B0 with alternatingly oppositely oriented magnetic fields, whereby the current conductors generating each one of the excitation fields have a distance from each other which causes a certain penetration depth in the material to be analyzed and echoes received therefrom provide measurement values which are characteristic for the material being analyzed.
    Type: Application
    Filed: September 30, 2004
    Publication date: February 24, 2005
    Inventors: Bernhard Blumich, Michael Bruder, Martin Klein, Karl-Heinz Krause, Michael Rabkin, Jurgen Stangenberg, Vladimir Anferov, Sophia Anferova, Radu Fechete