Patents by Inventor S. E. Buttrill, Jr.

S. E. Buttrill, 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).

  • Time-of-flight mass spectrometer with an aperture enabling tradeoff of transmission efficiency and resolution
    Patent number: 5300774
    Abstract: A time-of-flight mass spectrometer in which sample ions are generated from a target and are focussed into an ion beam that is incident onto a detector. A barrier that defines an aperture in the path of the ion beam is positioned to block ions having an extra large deviation from an average time-of-flight of the ions, thereby improving resolution. The aperture can be adjusted to adjust a tradeoff between sensitivity and resolution. Alternatively, the position of the aperture or the bias on an einzel lens can be adjusted to control this resolution.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: April 5, 1994
    Assignee: Applied Biosystems, Inc.
    Inventor: S. E. Buttrill, Jr.