Patents by Inventor Helene S. R. Brandrup-Wognsen

Helene S. R. Brandrup-Wognsen 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).

  • Diamond-impregnated hard material
    Patent number: 5723177
    Abstract: According to the present invention there is provided a wear resistant material consisting of 3-60% by volume of diamond in a matrix containing at least one hard constituent consisting of carbide, nitride and/or carbonitride of one metal of group IV, V and VI in the Periodic Table and a binder phase based upon Co, Ni and/or Fe at which the diamonds are surrounded by a layer >1 .mu.m of refractory metals, carbides, nitrides, oxides, borides or silicides. In this way, a dissolution of diamonds during the sintering is prevented by a special combination of layer material and sintering compaction process.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: March 3, 1998
    Assignee: Sandvik AB
    Inventors: Helene S. R. Brandrup-Wognsen, Stefan S. O. Ederyd
  • Diamond-impregnated hard materials
    Patent number: 5585175
    Abstract: According to the present invention there is provided a wear resistant material consisting of 3-60% by volume of diamond in a matrix containing at least one hard constituent consisting of carbide, nitride and/or carbonitride of one metal of group IV, V and VI in the Periodic Table and a binder phase based upon Co, Ni and/or Fe at which the diamonds are surrounded by a layer >1 .mu.m of refractory metals, carbides, nitrides, oxides, borides or silicides. In this way, a dissolution of diamonds during the sintering is prevented by a special combination of layer material and sintering compaction process.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: December 17, 1996
    Assignee: Sandvik AB
    Inventors: Helene S. R. Brandrup-Wognsen, Stefan S. O. Ederyd