Patents Examined by J. Greaves
  • Nonmagnetic nickel tungsten cemented carbide compositions and articles made from the same
    Patent number: 5273571
    Abstract: A nonmagnetic, NiWC cemented carbide composition and articles made from the same. The addition of chromium renders the composition nonmagnetic independent of the free carbon level in the composition. The composition is useful as wear resistant parts in electronic instruments and as punches to deep draw aluminum beverage cans.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: December 28, 1993
    Assignee: Valenite Inc.
    Inventors: Prakash K. Mirchandani, Laszlo J. Kastura, John W. Friederichs