Patents Assigned to Hill & Griffith Co.
  • Sand molding media for iron castings
    Patent number: 5587008
    Abstract: A sand molding medium for the use in founding of iron. The medium includes wettable uintaite as a carbon source supplemental to sea coal. The wettable uintaite is included in a carbon additive that is combined with sea coal to formulate the carbon component of an a pre-mix. The pre-mix also includes a clay component. The pre-mix is combined with sand to formulate the sand molding medium.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: December 24, 1996
    Assignee: Hill & Griffith Co.
    Inventors: Victor S. LaFay, Stephen L. Neltner