Patents by Inventor Frank D. Gac

Frank D. Gac 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).

  • Molybdenum disilicide matrix composite
    Patent number: 5000896
    Abstract: A composition consisting of an intermetallic compound, molybdenum disilicide, which is reinforced with VS silicon carbide whiskers dispersed throughout it and a method of making the reinforced composition. Use of the reinforcing material increases fracture toughness at low temperatures and strength at high temperatures, as compared to pure molybdenum disilicide.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: March 19, 1991
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: John J. Petrovic, David H. Carter, Frank D. Gac
  • Constrained ceramic-filled polymer armor
    Patent number: 4969386
    Abstract: An armor system in which a plurality of constraint cells are mounted on a surface of a substrate, which is metal armor plate or a similar tough material, such that the cells almost completely cover the surface of the substrate. Each constraint cell has a projectile-receiving wall parallel to the substrate surface and has sides which are perpendicular to and surround the perimeter of the receiving wall. The cells are mounted such that, in one embodiment, the substrate surface serves as a sixth side or closure for each cell. Each cell has inside of it a plate, termed the front plate, which is parallel to and in contact with substantially all of the inside surface of the receiving wall. The balance of each cell is completely filled with a projectile-abrading material, which is a ceramic material in particulate form dispersed in a polymeric matrix.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: November 13, 1990
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Donald J. Sandstrom, Noel C. Calkins, Frank D. Gac
  • Molybdenum disilicide matrix composite
    Patent number: 4927792
    Abstract: A composition consisting of an intermetallic compound, molybdenum disilicide, which is reinforced with VS silicon carbide whiskers dispersed throughout it and a method of making the reinforced composition. Use of the reinforcing material increases fracture toughness at low temperatures and strength at high temperatures, as compared to pure molybdenum disilicide.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: May 22, 1990
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: John J. Petrovic, David H. Carter, Frank D. Gac
  • Fabrication of precision glass shells by joining glass rods
    Patent number: 4726829
    Abstract: A method for making uniform spherical shells. The present invention allows niform hollow spheres to be made by first making a void in a body of material. The material is heated so that the viscosity is sufficiently low so that the surface tension will transform the void into a bubble. The bubble is allowed to rise in the body until it is spherical. The excess material is removed from around the void to form a spherical shell with a uniform outside diameter.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: February 23, 1988
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Frank D. Gac, Rodger D. Blake, Delbert E. Day, John S. Haggerty