Patents by Inventor Alan A. Bourne

Alan A. Bourne 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).

  • Jewelry alloys
    Patent number: 4165983
    Abstract: An alloy suitable for use in the fabrication of jewelry containing at least 95% by weight platinum and 1.5 to 3.5% by weight gallium, the balance being at least one of indium, gold, palladium, silver, copper, cobalt, nickel, ruthenium, iridium and rhodium. A Ga/Au/Pt alloy is preferred for ornamental application, and a Ga/In/Pt possibly including gold, silver or palladium is preferred for use in the manufacture of springs and clasps. Alloys are described which comply with hallmarking requirements but yet casting may be effected more easily than with pure platinum.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: August 28, 1979
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Alan A. Bourne, Arthur G. Knapton