Patents by Inventor Robert J. Karamon

Robert J. Karamon 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).

  • Yellow gold alloy
    Patent number: 4557895
    Abstract: A yellow gold alloy which resembles 10 karat gold in appearance and physical properties but has a gold content substantially less than 10 karat gold. The alloy consists essentially of 11% to 16% by weight gold, 28% to 34% by weight silver, 30% to 38% by weight copper, 8% to 12% by weight palladium, 7% to 10% by weight zinc, 0.2% to 0.4% silicon, and about 0.02% boron, and is particularly well suited for use in the manufacture of rings and other jewelry articles.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: December 10, 1985
    Assignee: Herff Jones, Inc.
    Inventors: Robert J. Karamon, Robert T. Allen