Patents by Inventor H. Graham Silver

H. Graham Silver 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).

  • Arc discharge lamp comprising mercury, scandium and lithium iodide, scandium emission being suppressed
    Patent number: 4053805
    Abstract: A metal halide arc discharge lamp has a fill including lithium iodide, mercury and scandium. In order to maintain a high efficiency in the red emission of the lamp, the ratio of lithium iodide to scandium must be between about 1.67 and 83.3.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: October 11, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: John A. Scholz, Phillip J. Gardner, H. Graham Silver