Patents by Inventor Mark S. Hilboldt

Mark S. Hilboldt 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: 4414178
    Abstract: An improved brazing alloy, particularly suited for use in high temperature gas turbine engines, has a composition range which exhibits X-ray inspection capability, improved stress rupture properties, good ductiity and oxidation resistance up to 1400.degree. F. The brazing alloy consists essentially of, by weight, about 20-80% Pd, 2-13% Cr, 1-4% B, balance being Ni and incidental impurities. The brazing alloy is capable of brazing in the 1800.degree.-2000.degree. F. temperature range and is less costly than Au-bearing brazing alloys currently in use for brazing in this temperature range.
    Type: Grant
    Filed: October 9, 1981
    Date of Patent: November 8, 1983
    Assignee: General Electric Company
    Inventors: Murray S. Smith, Jr., Mark S. Hilboldt, Pracheeshwar S. Mathur
  • Patent number: 4396577
    Abstract: A brazing alloy, particularly suited for use in high temperature gas turbine engines has a composition range which exhibits X-ray inspection capability, adequate stress rupture properties, ductility and oxidation resistance. The brazing alloy composition consists essentially of about 25-95% Pd, up to about 5% Si, up to about 3.5% B, balance being Co and incidental impurities, all percentages being by weight. The brazing alloy is capable of brazing in the 1800.degree.-2100.degree. F. temperature range and is less costly than current Au-bearing brazing alloys currently in use for brazing in this temperature range.
    Type: Grant
    Filed: October 9, 1981
    Date of Patent: August 2, 1983
    Assignee: General Electric Company
    Inventors: Murray S. Smith, Jr., Mark S. Hilboldt, Pracheeshwar S. Mathur
  • Patent number: 4381944
    Abstract: A powder alloy mixture for use in a method of repairing high temperature superalloy articles includes a first, higher temperature alloy powder in the range of about 35-65 weight percent of the mixture. The first alloy powder is based on at least one element selected from Ni and Co and is characterized as having good strength and environmental resistance along with the substantial absence of melting point depressant elements selected from Si and B in amounts greater than about 1% Si and 0.5% B. The second alloy powder is of a lower melting temperature alloy of Ni--Cr--Si--B--Co and is characterized by the substantial absence of C.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: May 3, 1983
    Assignee: General Electric Company
    Inventors: Murray S. Smith, Jr., Mark S. Hilboldt, Thirmaleshwara A. Bhat