Patents Represented by Attorney Ronald R. Castle

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  • Process for producing electroluminescent phosphors of improved brightness
    Patent number: 4859361
    Abstract: A process is disclosed for producing an electroluminescent phosphor which comprises blending a chloride flux, a copper source, and zinc sulfide to form a relatively uniform admixture, heating the admixture at a temperature of from about 1000.degree. C. to about 1300.degree. C.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: August 22, 1989
    Assignee: GTE Products Corporation
    Inventors: Kenneth T. Reilly, Richard G. W. Gingerich