Patents by Inventor Charles Wilker

Charles Wilker 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).

  • Method for reducing the coupling during reception between excitation and receive coils of a nuclear quadrupole resonance detection system
    Patent number: 7710116
    Abstract: This invention relates to a method for improving the performance of a nuclear quadrupole resonance detection system by reducing, during reception, the coupling between one or more excitation coils that provide a radio frequency magnetic field that excites quadrupole nuclei, and one or more high temperature superconductor receive coils that detect the resulting nuclear quadrupole resonance signal.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: May 4, 2010
    Assignee: The Penn State Research Foundation
    Inventors: Jeffrey L. Schiano, Charles Wilker
  • Method and system for adjusting the fundamental symmetric mode of coupled high temperature superconductor coils
    Patent number: 7521932
    Abstract: The frequency of the fundamental symmetric mode of two or more coupled essentially identical high temperature superconductor coils can be tuned, with little degradation in Q, by mechanically displacing the two or more coils with respect to one another. These coupled coils are useful in a detection system for detecting frequencies.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: April 21, 2009
    Assignee: The Penn State Research Foundation
    Inventors: Charles F. Carter, III, Daniel B. Laubacher, James D. McCambridge, Charles Wilker, Jiunn Sheng
  • Method for reducing the coupling between excitation and receive coils of a nuclear quadrupole resonance detection system
    Patent number: 7388377
    Abstract: This invention relates to a method for improving the performance of a nuclear quadrupole resonance detection system by reducing the coupling between one or more excitation coils that provide a radio frequency magnetic field that excites quadrupole nuclei, and one or more high temperature superconductor receive coils that detect the resulting nuclear quadrupole resonance signal.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: June 17, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Robby L. Alvarez, Daniel B. Laubacher, Charles Wilker
  • Method for reducing the coupling during reception between excitation and receive coils of a nuclear quadrupole resonance detection system
    Publication number: 20080129291
    Abstract: This invention relates to a method for improving the performance of a nuclear quadrupole resonance detection system by reducing, during reception, the coupling between one or more excitation coils that provide a radio frequency magnetic field that excites quadrupole nuclei, and one or more high temperature superconductor receive coils that detect the resulting nuclear quadrupole resonance signal.
    Type: Application
    Filed: October 30, 2007
    Publication date: June 5, 2008
    Inventors: Jeffrey L. Schiano, Charles Wilker
  • Use of multiple sensors in a nuclear quadropole resonance detection system to improve measurement speed
    Patent number: 7375525
    Abstract: The use of multiple sensors improves the measurement speed of a nuclear quadrupole resonance detection system when the nuclear quadrupole resonance frequency is known only within a range of frequencies.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: May 20, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Daniel B. Laubacher, James D. McCambridge, Charles Wilker
  • Periodic Variation of Velocity of Propagation to Reduce Additive Distortion Along Cable Length
    Publication number: 20080105449
    Abstract: A communications cable is provided that reduces the additive distortion of intended information encoded as electromagnetic energy that propagates longitudinally along the cable by varying the propagation velocity along its length. The additive distortion is reduced by varying the propagation periodically at a frequency that is lower than the highest frequency at which said electromagnetic energy propagates along said cable.
    Type: Application
    Filed: November 6, 2007
    Publication date: May 8, 2008
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Robert D. Kenny, Charles Wilker
  • USE OF MULTIPLE SENSORS IN A NUCLEAR QUADROPOLE RESONANCE DETECTION SYSTEM TO IMPROVE MEASUREMENT SPEED
    Publication number: 20080094061
    Abstract: The use of multiple sensors improves the measurement speed of a nuclear quadrupole resonance detection system when the nuclear quadrupole resonance frequency is known only within a range of frequencies.
    Type: Application
    Filed: December 15, 2004
    Publication date: April 24, 2008
    Inventors: Daniel B. Laubacher, James D. McCambridge, Charles Wilker
  • Use of two or more sensors to detect different nuclear quadrupole resonance signals of a target compound
    Patent number: 7355401
    Abstract: The use of two or more sensors tuned to at least two different nuclear quadrupole resonance frequencies of a target compound to detect the different nuclear quadrupole resonance signals greatly reduces the chance of misidentification, and thereby improves nuclear quadrupole resonance detection system performance.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: April 8, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Daniel B. Laubacher, James D. McCambridge, Charles Wilker
  • Frequency detection system comprising circuitry for adjusting the resonance frequency of a high temperature superconductor self-resonant coil
    Patent number: 7332910
    Abstract: The use of a circuit to adjust the resonance frequency of a high temperature superconductor self-resonant transmit, receive, or transmit and receive coil results in improved performance. The circuit is useful in a frequency detection system, especially in a nuclear quadrupole resonance detection system.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: February 19, 2008
    Assignees: E.I. du Pont de Nemours and Company, The Penn State Research Foundation
    Inventors: Daniel B. Laubacher, Charles Wilker, Jeffrey L. Schiano
  • Use of two or more sensors in a nuclear quadrupole resonance detection system to improve signal-to-noise ratio
    Patent number: 7265550
    Abstract: The use of two or more sensors tuned to the same nuclear quadrupole resonance frequency and detecting the nuclear quadrupole resonance signal results in improved signal-to-noise ratio and therefore improved nuclear quadrupole resonance detection system performance.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: September 4, 2007
    Assignee: E. I. duPont de Nemours and Company
    Inventors: Daniel B. Laubacher, James D. McCambridge, Charles Wilker
  • USE OF TWO OR MORE SENSORS IN A NUCLEAR QUADRUPOLE RESONANCE DETECTION SYSTEM TO IMPROVE SIGNAL-TO-NOISE RATIO
    Publication number: 20070176600
    Abstract: The use of two or more sensors tuned to the same nuclear quadrupole resonance frequency and detecting the nuclear quadrupole resonance signal results in improved signal-to-noise ratio and therefore improved nuclear quadrupole resonance detection system performance.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 2, 2007
    Inventors: Daniel Laubacher, James McCambridge, Charles Wilker
  • Decoupling high temperature superconductor sensor arrays in nuclear quadrupole resonance detection systems
    Patent number: 7248046
    Abstract: The decoupling of an array of two or more closely spaced high temperature superconductor sensors can be accomplished by introducing a capacitive decoupling circuit.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: July 24, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robby L. Alvarez, Charles Wilker
  • Detection of contraband using nuclear quadrupole resonance
    Patent number: 7106058
    Abstract: This invention relates to the use of a nuclear quadrupole resonance detection system for detecting contraband, wherein the detection system comprises a container with a detection panel and at least one coil for exciting and detecting the nuclear quadrupole resonance frequencies of a contraband source placed near an outer side of the detection panel.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: September 12, 2006
    Assignee: E.I. Dupont de Nemours and Company
    Inventors: Charles Wilker, James D. McCambridge
  • Method for reducing the coupling between excitation and receive coils of a nuclear quadrupole resonance detection system
    Publication number: 20060119357
    Abstract: This invention relates to a method for improving the performance of a nuclear quadrupole resonance detection system by reducing the coupling between one or more excitation coils that provide a radio frequency magnetic field that excites quadrupole nuclei, and one or more high temperature superconductor receive coils that detect the resulting nuclear quadrupole resonance signal.
    Type: Application
    Filed: December 2, 2005
    Publication date: June 8, 2006
    Inventors: Robby Alvarez, Daniel Laubacher, Charles Wilker
  • Frequency detection system comprising circuitry for adjusting the resonance frequency of a high temperature superconductor self-resonant coil
    Publication number: 20060012371
    Abstract: The use of a circuit to adjust the resonance frequency of a high temperature superconductor self-resonant transmit, receive, or transmit and receive coil results in improved performance. The circuit is useful in a frequency detection system, especially in a nuclear quadrupole resonance detection system.
    Type: Application
    Filed: November 22, 2004
    Publication date: January 19, 2006
    Inventors: Daniel Laubacher, Charles Wilker
  • Decoupling high temperature superconductor sensor arrays in nuclear quadrupole resonance detection systems
    Publication number: 20050270028
    Abstract: The decoupling of an array of two or more closely spaced high temperature superconductor sensors can be accomplished by introducing a capacitive decoupling circuit.
    Type: Application
    Filed: April 15, 2005
    Publication date: December 8, 2005
    Inventors: Robby Alvarez, Charles Wilker
  • Use of two or more sensors to detect different nuclear quadrupole resonance signals of a target compound
    Publication number: 20050206382
    Abstract: The use of two or more sensors tuned to at least two different nuclear quadrupole resonance frequencies of a target compound to detect the different nuclear quadrupole resonance signals greatly reduces the chance of misidentification, and thereby improves nuclear quadrupole resonance detection system performance.
    Type: Application
    Filed: February 4, 2005
    Publication date: September 22, 2005
    Inventors: Daniel Laubacher, James McCambridge, Charles Wilker
  • Detection of contraband using nuclear quadrupole resonance
    Publication number: 20050122109
    Abstract: This invention relates to the use of a nuclear quadrupole resonance detection system for detecting contraband, wherein the detection system comprises a container with a detection panel and at least one coil for exciting and detecting the nuclear quadrupole resonance frequencies of a contraband source placed near an outer side of the detection panel.
    Type: Application
    Filed: November 10, 2004
    Publication date: June 9, 2005
    Inventors: Charles Wilker, James McCambridge
  • Coupled high temperature superconductor coils
    Publication number: 20050046420
    Abstract: The frequency of the fundamental symmetric mode of two or more coupled essentially identical high temperature superconductor coils can be tuned, with little degradation in Q, by mechanically displacing the two or more coils with respect to one another. These coupled coils are useful in a detection system for detecting frequencies.
    Type: Application
    Filed: April 29, 2004
    Publication date: March 3, 2005
    Inventors: Daniel Laubacher, James McCambridge, Charles Wilker, Charles Carter