Patents by Inventor Edward L. De Kalb

Edward L. De Kalb 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).

  • Method of determining lanthanidies in a transition element host
    Patent number: 3936633
    Abstract: A phosphor composition contains a lanthanide activator element within a host matrix having a transition element as a major component. The host matrix is composed of certain rare earth phosphates or vanadates such as YPO.sub.4 with a portion of the rare earth replaced with one or more of the transition elements. On X-ray or other electromagnetic excitation, trace lanthanide impurities or additives within the phosphor are spectrometrically determined from their characteristic luminescence.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: February 3, 1976
    Assignee: The United States of America as represented by the United States Energy Research & Development Administration
    Inventors: Edward L. De Kalb, Velmer A. Fassel