Patents by Inventor Heather B. Skinner

Heather B. Skinner 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).

  • Thermionic electron emitters and methods of making them
    Patent number: 4417173
    Abstract: A thermionic cathode (FIG. 1) comprises a porous matrix of tungsten (4) impregnated with alkaline earth activator.A coating (5) 1 .mu.m thick is formed on the matrix (4). The coating is of .sigma. phase alloy of molybdenum and osmium.Alternative .sigma. phase alloys are disclosed, and various methods of making cathodes are disclosed.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: November 22, 1983
    Assignee: E M I-Varian Limited
    Inventors: Richard A. Tuck, Heather B. Skinner