Patents by Inventor Ioannis P. Vasatis

Ioannis P. Vasatis 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).

  • Generator rotor steels
    Patent number: 4985201
    Abstract: A low-alloy steel suitable for use in generator rotors and having a combination of good strength and impact energy with a high magnetic permeability is disclosed. The low-alloy steels are comprised of in weight percent; about 3.5 to 5.25 percent nickel, about 0.75 to 2.0, percent chromium, about 0.3 to 0.8 percent molybdenum, about 0.05 to 0.15 percent vanadium, about 0.1 to 0.28 percent carbon, about 0.03 to 0.1 percent niobium or titanium, and the balance substantially iron, wherein nickel, chromium, and carbon additions are balanced.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: January 15, 1991
    Assignee: General Electric Company
    Inventors: Keh-Minn Chang, Ioannis P. Vasatis