Patents by Inventor Larry I. Stein

Larry I. Stein 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).

  • Controlled thermal expansion superalloy
    Patent number: 5478417
    Abstract: The invention provides a controlled coefficient of thermal expansion alloy having in weight percent about 26-50% cobalt, about 20-40% nickel, about 20-35% iron, about 4-10% aluminum, about 0.5-5% niobium plus 1/2 of tantalum weight percent and about 1.5-10% chromium. Additionally the alloy may contain about 0-1% titanium, about 0-0.2% carbon, about 0-1% copper, about 0-2% manganese, about 0-2% silicon, about 0-8% molybdenum, about 0-8% tungsten, about 0-0.3% boron, about 0-2% rhenium, about 0-2% hafnium, about 0-0.3% zirconium, about 0-0.5% nitrogen, about 0-1% yttrium, about 0-1% lanthanum, about 0-1% total rare earths other than lanthanum, about 0-1% cerium, about 0-1% magnesium, about 0-1% calcium, about 0-4% oxidic dispersoid and incidental impurities. The alloy may be further optimized with respect to crack growth resistance by annealing at temperature below about 1010.degree. C. or temperatures between 1066.degree. C. or 1110.degree. C.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: December 26, 1995
    Assignee: Goro Nickel S.A.
    Inventors: Karl A. Heck, Melissa A. Moore, Darrell F. Smith, Jr., Larry I. Stein, John S. Smith
  • Controlled thermal expansion superalloy
    Patent number: 5439640
    Abstract: The invention provides a controlled coefficient of thermal expansion alloy having in weight percent about 26-50% cobalt, about 20-40% nickel, about 20-35% iron, about 4-10% aluminum, about 0.5-5% niobium plus 1/2 of tantalum weight percent and about 1.5-10% chromium. Additionally the alloy may contain about 0-1% titanium, about 0-0.2% carbon, about 0-1% copper, about 0-2% manganese, about 0-2% silicon, about 0-8% molybdenum, about 0-8% tungsten, about 0-0.3% boron, about 0-2% rhenium, about 0-2% hafnium, about 0-0.3% zirconium, about 0-0.5% nitrogen, about 0-1% yttrium, about 0-1% lanthanum, about 0-1% total rare earths other than lanthanum, about 0-1% cerium, about 0-1% magnesium, about 0-1% calcium, about 0-4% oxidic dispersoid and incidental impurities. The alloy may be further optimized with respect to crack growth resistance by annealing at temperature below about 1010.degree. C. or temperatures between 1066.degree. C. or 1110.degree. C.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: August 8, 1995
    Assignee: Inco Alloys International, Inc.
    Inventors: Karl A. Heck, Melissa A. Moore, Darrell F. Smith, Jr., Larry I. Stein, John S. Smith
  • Low expansion superalloy with improved toughness
    Patent number: 5425912
    Abstract: A high strength, low coefficient of thermal expansion superalloy exhibiting improved toughness over a broad temperature range down to about 4.degree. K. The composition is adapted for use with wrought superconducting sheathing.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: June 20, 1995
    Assignees: Inco Alloys International, Inc., Massachusetts Institute Of Technology
    Inventors: Darrell F. Smith, Larry I. Stein, Il S. Hwang