Patents by Inventor Richard J. Charles

Richard J. Charles 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).

  • Sintering of silicon nitride using Mg and Be additives
    Patent number: 4119690
    Abstract: A particulate dispersion of silicon nitride, magnesium additive and beryllium additive is formed into a green body and sintered at a temperature ranging from about 1800.degree. C to about 2200.degree. C in a sintering atmosphere of nitrogen at superatmospheric pressure producing a sintered body with a density ranging from about 80 to about 100%.
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: October 10, 1978
    Assignee: General Electric Company
    Inventors: Svante Prochazka, Charles D. Greskovich, Richard J. Charles, Robert A. Giddings
  • Sintering of silicon nitride using Mg and Be additives
    Patent number: 4119475
    Abstract: A particulate dispersion of silicon nitride, magnesium additive and beryllium additive is formed into a green body and sintered at a temperature ranging from about 1800.degree. C to about 2200.degree. C in a sintering atmosphere of nitrogen at superatmospheric pressure producing a sintered body with a density ranging from about 80% to about 100%.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: October 10, 1978
    Assignee: General Electric Company
    Inventors: Svante Prochazka, Charles D. Greskovich, Richard J. Charles, Robert A. Giddings