Patents by Inventor Thierry Copponex

Thierry Copponex 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).

  • Silver alloy
    Patent number: 9200350
    Abstract: A silver alloy with exceptional resistance to both tarnishing and firestain includes at least 92.50% silver, from 0.70 to 1.65% germanium, from 1.30 to 1.80% indium, from 0.000 to 0.015% boron, not more than 1.0% palladium and not more than 0.20% copper.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: December 1, 2015
    Assignee: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
    Inventors: Thierry Copponex, Kang Ping Haung