Patents by Inventor Amy Ann Heller

Amy Ann Heller 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).

  • 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