Patents by Inventor John F. Wroten, Jr.

John F. Wroten, Jr. 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).

  • Apparatus for simultaneous detection of positive and negative ions in ion mobility spectrometry
    Patent number: 4445038
    Abstract: An ion mobility detector has dual drift regions respectively on either side of a centrally located reaction region and respectively separated therefrom by dual shutter grids. Each drift region terminates in a Faraday cup. An ion accelerating electrical field gradient is provided between the Faraday cups so that negative ions are drawn into one drift region and positively charged ions are drawn into the other drift region.
    Type: Grant
    Filed: May 21, 1981
    Date of Patent: April 24, 1984
    Assignee: The Bendix Corporation
    Inventors: Glenn E. Spangler, John F. Wroten, Jr.