Patents by Inventor Eric L. Leonard

Eric L. Leonard 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).

  • Clean single crystal nickel base superalloy
    Patent number: 5759303
    Abstract: A nickel base superalloy composition consisting essentially of, in weight %, 9.3-10.0% Co, 6.4-6.8% Cr, 0.5-0.7% Mo, 6.2-6.6% W, 6.3-6.7% Ta, 5.45-5.75% Al, 0.8-1.2% Ti, 0.07-0.12% Hf, 2.8-3.2% Re, and balance essentially Ni wherein a carbon concentration of about 0.01 to about 0.08 weight % is provided for improving the cleanliness of a single crystal investment casting produced therefrom.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: June 2, 1998
    Assignee: Howmet Research Corporation
    Inventors: John R. Mihalisin, John Corrigan, Robert J. Baker, Eric L. Leonard, Jay L. Vandersluis
  • Clean single crystal nickel base superalloy
    Patent number: 5549765
    Abstract: A nickel base superalloy composition consisting essentially of, in weight %, 9.3-10.0% Co, 6.4-6.8% Cr, 0.5-0.7% Mo, 6.2-6.6% W, 6.3-6.7% Ta, 5.45-5.75% Al, 0.8-1.2% Ti, 0.07-0.12% Hf, 2.8-3.2% Re, and balance essentially Ni wherein a carbon concentration of about 0.01 to about 0.08 weight % is provided for improving the cleanliness of a single crystal investment casting produced therefrom.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: August 27, 1996
    Assignee: Howmet Corporation
    Inventors: John R. Mihalisin, John Corrigan, Robert J. Baker, Eric L. Leonard, Jay L. Vandersluis