Patents by Inventor Robert J. Barnhurst

Robert J. Barnhurst 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).

  • Creep resistant zinc-aluminum based casting alloy
    Patent number: 4965046
    Abstract: A creep resistant zinc-aluminum based casting alloy comprises in weight percent 3-18% aluminum, 0.01-0.15% magnesium, 0.01-0.05% or manganese or manganese and lithium in the concentrations between 0.01-0.05% Mn and 0.02-0.1% Li, the balance being zinc except for impurities commonly found in zinc alloys.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: October 23, 1990
    Assignee: Noranda Inc.
    Inventor: Robert J. Barnhurst