Patents by Inventor Leif A. E. Akesson

Leif A. E. Akesson 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).

  • Patent number: 4843039
    Abstract: The present invention relates to a sintered body for chip forming machining containing at least one hard constituent comprising a carbide, nitride and/or carbonitride of a metal of group IVB, VB or VIB in the periodical system and a binder metal based upon Co, No and/or Fe, in which the body comprises a core containing eta-phase or an intermediate phase, substantially free of carbon and/or nitrogen surrounded by a hard constituent- and binder phase-containing surface zone, free of said eta-phase or intermediate phase.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: June 27, 1989
    Assignee: Santrade Limited
    Inventors: Leif A. E. Akesson, Marian Mikus
  • Patent number: 4300952
    Abstract: An improvement in a cemented hard metal is disclosed. A molybdenum-tungsten-carbonitride is disclosed having the structure of tungsten carbide wherein the molybdenum and/or tungsten are at least partly substituted for by a metal selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof. The carbonitride may be mixed with a binder metal and sintered in a conventional manner to form a dense, substantially pore-free material.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: November 17, 1981
    Assignee: Sandvik Aktiebolag
    Inventors: Nils A. Ingelstrom, Leif A. E. Akesson