Patents Assigned to PPT Resaerch, Inc.
  • Cutting and lubricating composition for use with a wire cutting apparatus
    Patent number: 6602834
    Abstract: The invention provides a cutting and lubricating composition with abrasive particles for cutting hard and brittle workpieces with a wire saw or other cutting or grinding tool. The composition provides electrostatic and steric repulsion between the abrasive particles to maintain the particles in suspension without forming hard settled cakes from suspension “fall-out”.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: August 5, 2003
    Assignee: PPT Resaerch, Inc.
    Inventors: Irl B. Ward, Amy Ann Heller, Danielle Anne French, Susan Jane Broadway