Patents by Inventor Karsten H. Styhr

Karsten H. Styhr 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).

  • Method of making a duo density silicon nitride article
    Patent number: 4087500
    Abstract: A method of making a duo density article of silicon nitride is disclosed. A first element is formed by hot pressing silicon nitride particles. The general shape of a second element is formed by injection molding silicon metal particles and a binder and subsequently burning out the binder. The second element is nitrided in a nitriding operation. Facing surface areas of the first element and the second element are bonded together by applying heat to both elements and pressure to one of the elements while the other element is held in a fixed position.
    Type: Grant
    Filed: December 20, 1973
    Date of Patent: May 2, 1978
    Assignee: Ford Motor Company
    Inventors: Eugene A. Fisher, Michael U. Goodyear, Arthur F. McLean, Karsten H. Styhr