Patents by Inventor Geoffrey P. Summers

Geoffrey P. Summers 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).

  • High-quantum efficiency, long-lived luminescing refractory oxides
    Patent number: 4427570
    Abstract: A crystal having a high-quantum efficiency and a long period of luminescence is formed of an oxide selected from the group consisting of magnesium oxide and calcium oxide and possessing a concentration ratio of H.sup.- ions to F centers in the range of about 0.05 to about 10.
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: January 24, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Yok Chen, Roberto Gonzalez, Geoffrey P. Summers