Patents by Inventor Daniel Gershman

Daniel Gershman 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).

  • Auxiliary frequency parametric excitation of quadrupole mass spectrometers
    Patent number: 8487249
    Abstract: The apparatus introduces a second adjustable resonant point in a QMS at a frequency that is close to a multiple of the fundamental frequency by adjusting driving point impedance characteristics of the QMS. The apparatus measures the first and second resonant point of the QMS to account for changes in the operational characteristics of the QMS.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: July 16, 2013
    Assignee: The Regents of the University of Michigan Office of Technology Transfer
    Inventors: Daniel Gershman, Bruce Block, Martin Rubin, Thomas Zurbuchen
  • AUXILIARY FREQUENCY PARAMETRIC EXCITATION OF QUADRUPOLE MASS SPECTROMETERS
    Publication number: 20120145892
    Abstract: The apparatus introduces a second adjustable resonant point in a QMS at a frequency that is close to a multiple of the fundamental frequency by adjusting driving point impedance characteristics of the QMS. The apparatus measures the first and second resonant point of the QMS to account for changes in the operational characteristics of the QMS.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 14, 2012
    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Daniel Gershman, Bruce Block, Martin Rubin, Thomas Zurbuchen