Patents by Inventor Norman J. LaMontagne, Jr.

Norman J. LaMontagne, Jr. 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).

  • Tarnish resistant gold colored alloy
    Patent number: 5409663
    Abstract: An indium-free, gold-colored, tarnish and corrosion-resistant alloy having no greater than 10% by weight gold and a color value, as measured according to the Cielab Color Measurement System, of approximately L=87.4, a=1.1, b=15.3. The alloy comprises 28-35% copper, 19.5-22.5% silver, 6-11% palladium, 22-32% zinc, 0.1-1% aluminum, and 0.5-3% platinum.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: April 25, 1995
    Inventors: Arthur D. Taylor, Norman J. LaMontagne, Jr., Malcolm Warren