Patents by Inventor Andrew R. Walsh

Andrew R. Walsh 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).

  • Sulfidation resistant nickel-iron base alloy
    Patent number: 4379120
    Abstract: A sulfidation-resistant alloy containing about 0.02-0.08 w/o carbon, 21-24.5 w/o chromium, 52-60 w/o nickel, 1-3.5 w/o molybdenum, 1.75-3.25 w/o titanium, 0.75-2.25 w/o aluminum, 0.50-2 w/o columbium, up to 0.02 w/o boron and the balance iron, the elements being balanced to provide an average electron-vacancy number Nv not greater than 2.54. When so balanced, the alloy is stabilized against the formation of no more than 10 v/o Cr-rich alpha phase. Preferably, the elements are balanced so that Nv is not greater than 2.45 and better yet not greater than 2.40.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: April 5, 1983
    Assignee: Carpenter Technology Corporation
    Inventors: C. Raymond Whitney, Andrew R. Walsh