Patents Represented by Attorney Richard T. Guttman

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  • Electrical contact materials and methods of making the same
    Patent number: 3960553
    Abstract: The contact materials comprise silver with additions of mercury or mercury and tellurium and silver-cadmium oxide compositions with additions of mercury and tellurium. The methods of making the materials include the steps of adding a silver-mercury alloy to molten silver and to a molten silver-tellurium powder mixture. The materials including cadmium oxide are produced by heating a mixture of powders of silver, a cadmium-tellurium compound, cadmium oxide, and mercuric oxide powders in a reducing atmosphere and then reoxidizing.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: June 1, 1976
    Assignee: Square D Company
    Inventor: Terrence Ardern Davies