Patents by Inventor Paul M. Novotny

Paul M. Novotny 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).

  • Age hardenable alloy with a unique combination of very high strength and good toughness
    Patent number: 5866066
    Abstract: An age hardenable martensitic steel alloy having a unique combination of very high strength and good toughness consists essentially of, in weight percent, about______________________________________ C 0.21-0.34 Mn 0.20 max. Si 0.10 max. P 0.008 max. S 0.003 max. Cr 1.5-2.80 Mo 0.90-1.80 Ni 10-13 Co 14.0-22.0 Al 0.1 max. Ti 0.05 max. Ce 0.030 max. La 0.010 max. ______________________________________the balance essentially iron. In addition, cerium and sulfur are balanced so that the ratio Ce/S is at least about 2 and not more than about 15. A small but effective amount of calcium can be present in place of some or all of the cerium and lanthanum.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: February 2, 1999
    Assignee: CRS Holdings, Inc.
    Inventors: Raymond M. Hemphill, David E. Wert, Paul M. Novotny, Michael L. Schmidt
  • Corrosion resistant, martensitic steel alloy
    Patent number: 5370750
    Abstract: A martensitic steel alloy has a unique combination of hardness and corrosion resistance. Broadly stated, the alloy contains, in weight percent, about______________________________________ C 1.40-1.75 Mn 0.30-1.0 Si 0.80 max. P 0.020 max. S 0.015 max. Cr 13.5-18.0 Ni 0.15-0.65 Mo 0.40-1.50 V 1.0 max. N 0.02-0.08 ______________________________________and the balance essentially iron. The alloy is balanced within the stated weight percent ranges such that the ratio %Cr:%C is about 10.0-11.0 and the sum %Ni+%Mn is at least about 0.75. The alloy can be hardened to at least about 60 HRC from a wide range of solution treating temperatures and provides corrosion resistance that is similar to Type 440C alloy.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: December 6, 1994
    Assignee: CRS Holdings, Inc.
    Inventors: Paul M. Novotny, Thomas J. McCaffrey, Raymond M. Hemphill
  • High strength, high fracture toughness alloy
    Patent number: 5268044
    Abstract: A high strength, high fracture toughness steel alloy consisting essentially of, in weight percent, about______________________________________ C 0.2-0.33 Mn 0.20 max. Si 0.1 max. P 0.008 max. S 0.004 max. Cr 2-4 Ni 10.5-15 Mo 0.75-1.75 Co 8-17 Ce Effective amount-0.030 La Effective amount-0.01 Fe Balance ______________________________________and an article made therefrom are disclosed. A small but effective amount of calcium can be present in this alloy in substitution for some or all of the cerium and lanthanum. The alloy is an age-hardenable martensitic steel alloy which provides a unique combination of tensile strength and fracture toughness. The alloy provides excellent mechanical properties when hardened by vacuum heat treatment with inert gas cooling and has a low ductile-to-brittle transition temperature.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: December 7, 1993
    Assignee: Carpenter Technology Corporation
    Inventors: Raymond M. Hemphill, David E. Wert, Paul M. Novotny, Michael L. Schmidt