Patents by Inventor Greg Chitwood

Greg Chitwood 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).

  • Method of precipitation-hardening a nickel alloy
    Patent number: 5429690
    Abstract: The Application relates to a precipitation hardening alloy which has a 0.2% proof stress of at least 500 N/mm.sup.2 and a high resistance to corrosion in highly aggressive sour gas media. The alloy consists of 43 to 51% nickel, 19 to 24% chromium, 4.5 to 7.5% molybdenum, 0.4 to 2.5% copper, 0.3 to 1.8% aluminium and 0.9 to 2.2% titanium, residue iron. Heat treatment processes are described which allow the establishment in the alloy of high strength accompanied by satisfactory ductility.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: July 4, 1995
    Inventors: Ulrich Heubner, Michael Kohler, Greg Chitwood, Jon Bryant