Patents by Inventor John W. Walkiewicz

John W. Walkiewicz 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).

  • High coercive force rare earth metal-cobalt magnets containing copper and magnesium
    Patent number: 4174966
    Abstract: A magnetic alloy composition, which comprises: an alloy of the formula:34 to 37 wt.% RE 55.6 to 63.9 wt.% Co 2 to 7 wt.% Cu .05 to .40 wt.% Mgwherein RE is mischmetal or a rare earth metal excluding samarium.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: November 20, 1979
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventor: John W. Walkiewicz