Patents by Inventor William E. Silvis

William E. Silvis 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).

  • Matrix for a hard composite
    Patent number: 5733664
    Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder includes crushed sintered cemented tungsten carbide particles. The composition of the crushed sintered cemented tungsten carbide comprises between about 6 weight percent and about 13 weight percent binder metal and between about 87 weight percent and about 94 weight percent tungsten carbide.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: March 31, 1998
    Assignee: Kennametal Inc.
    Inventors: Harold E. Kelley, William E. Silvis, Charles J. Terry, Gary R. Peterson
  • Matrix for a hard composite
    Patent number: 5733649
    Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder including macrocrystalline tungsten carbide particles, crushed sintered cemented macrocrystalline tungsten carbide particles, tungsten carbide, and an iron-based component.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: March 31, 1998
    Assignee: Kennametal Inc.
    Inventors: Harold E. Kelley, William E. Silvis, Charles J. Terry
  • Matrix for a hard composite
    Patent number: 5589268
    Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder including macrocrystalline tungsten carbide particles, crushed sintered cemented macrocrystalline tungsten carbide particles, tungsten carbide, and an iron-based component.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: December 31, 1996
    Assignee: Kennametal Inc.
    Inventors: Harold E. Kelley, William E. Silvis, Charles J. Terry