Patents by Inventor Leif E. A. Akesson

Leif E. A. 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).

  • Diffusion barrier coating material
    Patent number: 5135801
    Abstract: A coated body consisting of a substrate that can be decarburized during a carbide, nitride or carbonitride coating process comprising a first (innermost) carbon diffusion retarding coating of MetCO, MetCON, MetON adjacent to the substrate and a second (next innermost) wear resistant coating of MetC, MetN and/or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof. The intermediate coating has been found beneficial in order to reduce or even eliminate the formation of eta phase in the substrate.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: August 4, 1992
    Assignee: Sandvik AB
    Inventors: Asa K. Nystrom, Jan N. Lindstrom, Mats E. C. Sjostrand, Leif E. A. Akesson