Patents by Inventor David John McComas

David John McComas 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).

  • Mass spectrometry with enhanced particle flux range
    Patent number: 6815689
    Abstract: A system and method for suppressing secondary electron counts in systems that count particles. The secondary electrons are produced in a foil or other secondary electron emitting surface. A suppression grid is placed in front of the particle detector. The grid is held at an applied voltage that prevents some portion of the electrons from being transmitted through the grid and reaching the detector. The applied voltage may be adjusted and varied in a manner that provides a predicable electron count and an enhanced dynamic range of measurements at the detector.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: November 9, 2004
    Assignee: Southwest Research Institute
    Inventor: David John McComas