Patents by Inventor Björn Sk{dot over (a)}rman

Björn Sk{dot over (a)}rman 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).

  • Lubricants for insulated soft magnetic iron-based powder compositions
    Patent number: 7718082
    Abstract: The invention concerns a powder metallurgical composition containing, preferably a coarse, soft magnetic iron or iron-based powder, wherein the particles are surrounded by an insulating inorganic coating and as lubricant at least one non-drying oil or liquid having a crystalline melting point below 25° C., a viscosity (?) at 40° C. above 15 mPas and wherein said viscosity is temperature dependent according to the following formula: 10 log ?=k/T+C wherein the slope k is above 800 T is in Kelvin and C is a constant in an amount between 0.05 and 0.4% by weight of the composition.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: May 18, 2010
    Assignee: Höganäs AB
    Inventors: Hilmar Vidarsson, Paul Skoglund, Björn Sk{dot over (a)}rman