Patents Represented by Attorney Allen Uzzell

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  • Method of melting metals to reduce contamination from crucibles
    Patent number: 4028096
    Abstract: Contamination of metals from crucible materials during melting operations is reduced by coating the interior surface of the crucible with a ceramic non-reactive with the metallic charge and disposing a metal liner formed from a portion of the metallic charge within the coated crucible. The liner protects the ceramic coating during loading of the remainder of the charge and expands against the ceramic coating during heat-up to aid in sintering the coating.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: June 7, 1977
    Assignee: The United States of America as represented by the United States Energy Research and Development Administration
    Inventors: John G. Banker, Hubert L. Wigginton