Patents by Inventor Johanna B. Salsman

Johanna B. Salsman 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).

  • Microwave induced plasma process for producing tungsten carbide
    Patent number: 5131992
    Abstract: A method of heating reactant materials in a plasma chamber to achieve a reaction temperature by enveloping the materials in a microwave induced electric plasma. The plasma chamber positioned in the microwave waveguide is filled with a gas and predetermined quantities of the reactant materials are placed in the chamber or reactor. A microwave produced electric field is passed through the gas to ionize it and produce an electric plasma that envelopes the reactant materials. The process may be used in a variety of high temperature chemical processes such as the production of tungsten carbide.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: July 21, 1992
    Assignee: The United States of America, as represented by the Secretary of the Interior
    Inventors: Ronald H. Church, Johanna B. Salsman, Bobby J. Hamner