Patents by Inventor Warren Tan

Warren Tan 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).

  • Nickel-based superalloys exhibiting minimal grain defects
    Patent number: 6096141
    Abstract: Carbide-forming elements are added to nickel-based superalloys so as to minimize grain defects, such as freckle and stray grain defects. More specifically, carbide-forming elements that form from the liquid in the mushy zone of the solidification front of single crystal (SC) and directionally solidified (DS) nickel-based superalloys are added so as to reduce the formation of freckle and stray grain defects in such alloys. A preferred nickel-based superalloy includes, by weight, between about 6.00%-9.25% tantalum, 4.75%-6.50% tungsten, at least about 2.75% rhenium, between about 5.00% to about 7.00% aluminum, at least about 0.10% hafnium and carbon in an amount sufficient (typically between about 0.10-0.15% by weight) to form carbides with other constituents to reduce significantly freckle formation in the mushy zone of the superalloy during casting.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: August 1, 2000
    Assignee: General Electric Co.
    Inventors: Warren Tan King, Tresa M. Pollock, Christine Louise Zemsky, Wendy Howard Murphy
  • Customer identification terminal
    Patent number: D364386
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: November 21, 1995
    Assignee: Transaction Technology, Inc.
    Inventors: Larry Bramlett, Charles T. Inatomi, Robert R. Propp, Warren Tan