Patents by Inventor Neil R. Johnson

Neil R. Johnson 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).

  • Novel grinding wheels utilizing polycrystalline diamond or cubic boron nitride grit
    Patent number: 4923490
    Abstract: The invention provides grinding tools comprising thermally stable polycrystalline diamond or cubic boron nitride abrasive particles and single crystal diamond or cubic boron nitride abrasive particles attached to a support means via a bonding matrix such as a sintered or electrodeposited metal or alloy matrix, a resinous matrix, or a vitreous matrix.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: May 8, 1990
    Assignee: General Electric Company
    Inventors: Neil R. Johnson, Harold P. Bovenkerk
  • Sawblade segments utilizing polycrystalline diamond grit
    Patent number: 4883500
    Abstract: The present invention provides saw blade segments comprising polycrystalline diamond cutting elements and single crystal diamond cutting elements dispersed in a bonding matrix. In a preferred embodiment abrasion resistant particles are included so as to cause non-uniform wearing of the cutting segments. In another aspect of the invention, cutting segments are provided which utilize surface set polycrystalline diamond cutting elements larger than mesh size 18.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: November 28, 1989
    Assignee: General Electric Company
    Inventors: Martin E. Deakins, David E. Slutz, Neil R. Johnson, Thomas J. Clark, Harold P. Bovenkerk