Patents by Inventor Fred C. Schwerer

Fred C. Schwerer 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).

  • Turbo-pumped scanning electron microscope
    Patent number: 5376799
    Abstract: A scanning electron microscope with an effective vacuum evacuation system and vacuum pump mounting system is disclosed. A manifold having a sufficiently large gas conductance is connected to a gun assembly and to a specimen chamber. A vacuum pump is connected to the manifold for evacuating the gun assembly, specimen chamber and a beam tube. The vacuum pump mounting includes a cylindrical sleeve extending between the vacuum pump and the scanning electron microscope housing with a pair of radial O-rings sealing between the cylindrical sleeve, housing and vacuum pump.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: December 27, 1994
    Assignee: RJ Lee Group, Inc.
    Inventors: Frederick H. Schamber, Fred C. Schwerer, Albert H. Beebe, Richard J. Lee