Patents by Inventor Edward L. Exner

Edward L. Exner 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).

  • Alumina - zirconia ceramics reinforced with silicon carbide whiskers and methods of making the same
    Patent number: 4749667
    Abstract: Disclosed is a 35 to 45 volume percent silicon carbide whisker reinforced ceramic composite containing alumina and from about 5 to 21 volume percent zirconia which is used to make hard cutting tools having excellent toughness and hardness. Also disclosed are methods of producing the same.
    Type: Grant
    Filed: February 3, 1987
    Date of Patent: June 7, 1988
    Assignee: Carboloy Inc.
    Inventors: Choll K. Jun, Edward L. Exner