Patents Examined by Torenzo B. Hayes
  • Drilling bit
    Patent number: 4491457
    Abstract: In a diamond impregnated bit scourer particles in the form of silicon carbide are added to the matrix. The mesh size of the silicon carbide is less than that of diamond and the concentration preferably about 40, if the diamond concentration is 40.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: January 1, 1985
    Assignee: Boart International Limited
    Inventor: Noel C. Pope