Patents by Inventor James P. Materkowski

James P. Materkowski 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: 5802955
    Abstract: A corrosion resistant cermet comprises a ceramic component (e.g., WC) and a binder alloy comprised of a major component (e.g., one or more of iron, nickel, cobalt, their mixtures, and their alloys) and at least one additive component (e.g., one or more of ruthenium, rhodium, palladium, osmium, iridium, and platinum).Plungers for hyper compressors used in the corrosive environments generated during the manufacture of low density polyethylene (LDPE) or ethylene copolymers are an example of the use of the corrosion resistant cermet.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: September 8, 1998
    Assignee: Kennametal Inc.
    Inventors: William M. Stoll, James P. Materkowski, Ted R. Massa
  • Patent number: 5658678
    Abstract: A corrosion resistant cermet comprises a ceramic component (e.g., WC) and a binder alloy comprised of a major component (e.g., one or more of iron, nickel, cobalt, their mixtures, and their alloys) and at least one additive component (e.g., one or more of ruthenium, rhodium, palladium, osmium, iridium, and platinum). Plungers for hyper compressors used in the corrosive environments generated during the manufacture of low density polyethylene (LDPE) or ethylene copolymers are an example of the use of the corrosion resistant cermet.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: August 19, 1997
    Assignee: Kennametal Inc.
    Inventors: William M. Stoll, James P. Materkowski, Ted R. Massa
  • Patent number: 5603075
    Abstract: A corrosion resistant cermet comprises a ceramic component (e.g., WC) and a binder alloy comprised of a major component (e.g., one or more of iron, nickel, cobalt, their mixtures, and their alloys) and at least one additive component (e.g., one or more of ruthenium, rhodium, palladium, osmium, iridium, and platinum).Plungers for hyper compressors used in the corrosive environments generated during the manufacture of low density polyethylene (LDPE) or ethylene copolymers are an example of the use of the corrosion resistant cermet.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: February 11, 1997
    Assignee: Kennametal Inc.
    Inventors: William M. Stoll, James P. Materkowski, Ted R. Massa
  • Patent number: 5337801
    Abstract: A tough, wear resistant body is provided. The body includes hard carbide particles embedded in and bonded with a first casted steel matrix material. The body may be embedded in and bonded with a second steel matrix to form a wear resistant composite. The second steel matrix has a melting point at least 200 degrees F. greater than the melting point of the first steel matrix, thereby facilitating a metallurgical bond between the surface of the wear resistant body and the second steel matrix. The composite structure is particularly suitable for earthmoving and other severe mechanical applications.
    Type: Grant
    Filed: May 1, 1991
    Date of Patent: August 16, 1994
    Assignee: Kennametal Inc.
    Inventor: James P. Materkowski
  • Patent number: 5279902
    Abstract: An air hardened steel having a reduced nickel content and acceptable impact hardness. The air hardened steel may include 0.18-0.35 w/o carbon, 1.3-1.75 w/o silicon, 1.3-2.0 w/o manganese, 0.65-2.1 w/o chromium, 0.9-2.0 w/o nickel and 0.2-0.35 w/o molybdenum and the balance impurities, deoxidants, and iron.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: January 18, 1994
    Assignee: Kennametal Inc.
    Inventor: James P. Materkowski
  • Patent number: 5094923
    Abstract: An air hardened steel having a reduced nickel content and acceptable impact toughness. The air hardened steel may include 0.18-0.35 w/o carbon, 1.3-1.75 w/o silicon, 1.3-2.0 w/o manganese, 0.65-2.1 w/o chromium, 0.9-2.0 w/o nickel and 0.2-0.35 w/o molybdenum and the balance impurities, deoxidants, and iron.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: March 10, 1992
    Assignee: Kennametal Inc.
    Inventor: James P. Materkowski
  • Patent number: 5066546
    Abstract: A tough, wear resistant body is provided. The body includes hard carbide particles embedded in and bonded with a first casted ferrous matrix material such as steel or cast iron. The body may be embedded in and bonded with a second steel matrix to form a wear resistant composite. The second steel matrix has a melting point at least 200 degrees F. greater than the melting point of the first ferrous matrix, thereby facilitating a metallurgical bond between the surface of the wear resistant body and the second steel matrix. The composite structure is particularly suitable for earthmoving and other severe mechanical applications.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: November 19, 1991
    Assignee: Kennametal Inc.
    Inventor: James P. Materkowski