Patents by Inventor John E. Stulga

John E. Stulga 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).

  • Patent number: 4731117
    Abstract: An age-hardenable, corrosion-resistant, nickel-base fully dense article of compacted prealloyed particles. The article has a fine, uniformly distributed gamma-prime phase for strength and hardness. The alloy consists essentially of, in weight percent, carbon 0.05 max, chromium 15 to 25, molybdenum 6.5 to 10, columbuium 4 to 6.5, iron 9 max, aluminum 0.2 to 0.8, nitrogen 0.05 max, titanium, 0.6 max, and balance nickel. The alloy article has an absence of interstitial phases at prior particle boundaries and may be age-hardened to a minimum room-temperature 0.2% offset yield strength of 120,000 psi.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: March 15, 1988
    Assignee: Crucible Materials Corporation
    Inventors: John E. Stulga, Frank J. Rizzo