Patents by Inventor Robert Grierson

Robert Grierson 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).

  • Tungsten-nickel-iron-molybdenum alloys
    Patent number: 3988118
    Abstract: This invention is directed to the use of tungsten base alloys containing about 1 to 12 weight percent nickel, about 0.5 to 8 weight percent iron and about 0.5 to about 25 percent molybdenum and at least one additional additive selected from cobalt, chromium, manganese, vanadium, tantalum, zirconium, titanium, yttrium, rhenium, boron, and silicon. Chromium may substitute for molybdenum up to 15%. In addition to being useful for high density applications, structural applications, and high temperature applications, the alloys may be used for die casting dies, molds, cores and other metal shaping members.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: October 26, 1976
    Assignee: P. R. Mallory & Co., Inc.
    Inventors: Robert Grierson, Earl I. Larsen