Patents by Inventor John S. Kutzamanis

John S. Kutzamanis 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 austenitic alloy
    Patent number: 4487744
    Abstract: An austenitic stainless corrosion resistant alloy and articles made therefrom having good resistance to pitting and crevice corrosion in oxidizing chloride-bearing media combined with resistance to general corrosion and to intergranular corrosion in oxidizing media, containing in weight percent about______________________________________ w/o ______________________________________ C 0.06 Max. Mn 1.4 Max. Si 0.9 Max. P 0.035 Max. S 0.035 Max. Cr 20-26 Ni 34-44 Mo 3-<5.1 Cu 0.1-<3.1 N 0.4 Max. B 0.005 Max. Ce + La 0.4 Max. Added Nb 1 Max. Ti 0.5 Max. ______________________________________and the balance iron. The amount of nitrogen is not greater than that which can be retained in solution. When present niobium plus titanium ranges upward from a minimum which is sufficient to combine stoichiometrically with the amount of carbon present in excess of 0.025 w/o. In this composition the elements chromium, nickel, molybdenum and copper are balanced so that the value of Correlation I is equal to or less than 1.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: December 11, 1984
    Assignee: Carpenter Technology Corporation
    Inventors: Terry A. DeBold, Douglas G. Frick, John S. Kutzamanis