Patents by Inventor Vancliff Johnson

Vancliff Johnson 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).

  • Rare earth manganese silicides
    Patent number: 3963829
    Abstract: Compositions of the formula GdMn.sub.1.sub.-x Fe.sub.x Si where 0<x.ltoreq.0.5 or LnMnSi where Ln is at least one of Gd, La or Y can be made by heating stoichiometric amounts of the elements or composition of two or more thereof. The compositions are magnetic with Curie temperatures in the range 275.degree.-330.degree.K. and can be used in thermally activated magnetic switches.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: June 15, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Vancliff Johnson