Patents by Inventor Charles F. Cook

Charles F. Cook 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).

  • Isotope analysis
    Patent number: 4068122
    Abstract: The difference in concentration of a selected isotope in two materials is measured by directing beams of the materials toward the inlet of a mass spectrometer. A shutter is positioned in each beam to pass the two beams at predetermined different frequencies. The output signal from the mass spectrometer is applied to two synchronous detectors, each of which receives a reference signal representative of the frequency at which a respective beam is passed to the mass spectrometer. The output signals from the two detectors are compared.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: January 10, 1978
    Assignee: Phillips Petroleum Company
    Inventors: Thomas W. Schmidt, Charles F. Cook