Patents by Inventor Charles B. Bruskotter

Charles B. Bruskotter 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).

  • Phosphor purification process
    Patent number: 4221676
    Abstract: A process for removing suspected heavy metal contaminants from a manganese-arsenic activated, zinc orthosilicate phosphor comprises contacting the phosphor, in an aqueous slurry, with an organic chelating agent such as an alkali metal salt of ethylenediamine tetraacetate and subsequently rinsing, filtering, drying and sieving the phosphor and baking the sieved phosphor.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: September 9, 1980
    Assignee: GTE Products Corporation
    Inventors: Charles B. Bruskotter, David R. Hamilton