Patents by Inventor William M. Stoll

William M. Stoll 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).

  • Corrosion resistant cermet wear parts
    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
  • Corrosion resistant cermet wear parts
    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
  • Corrosion resistant cermet wear parts
    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
  • Wear resistant facings for couplings
    Patent number: 4666797
    Abstract: This invention relates to mixtures of tungsten carbide, niobium metal, and molybdenum metal powders for use in the hardfacing of drill pipe couplings used in earth boring operations. It has been found that the addition of small amounts of niobium metal alone, or in combination with molybdenum, are effective to substantially submerge the tungsten carbide particles in the weld pool produced during hardfacing while, also, minimizing the occurrence of cracks which may be produced as the weld pool freezes.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: May 19, 1987
    Assignee: Kennametal Inc.
    Inventors: Harold C. Newman, William M. Stoll
  • Powder mixtures for wear resistant facings and products produced therefrom
    Patent number: 4414029
    Abstract: This invention relates to mixtures of tungsten carbide, niobium metal, and molybdenum metal powders for use in the hardfacing of drill pipe couplings used in earth boring operations. It has been found that the addition of small amounts of niobium metal alone, or in combination with molybdenum, are effective to substantially submerge the tungsten carbide particles in the weld pool produced during hardfacing while, also, minimizing the occurrence of cracks which may be produced as the weld pool freezes.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: November 8, 1983
    Assignee: Kennametal Inc.
    Inventors: Harold C. Newman, William M. Stoll