Patents by Inventor Bernard Madden

Bernard Madden 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).

  • Publication number: 20130004363
    Abstract: A new nickel-free sterling silver alloy with superior tarnish resistant, yet substantially similar cold working and mechanical properties is disclosed using a specified mixture of zinc, copper, silicon, iridium, and indium with pure silver. A new and improved method of manufacture involving a four-step process whereby the non-silver components are fabricated in an inert gas or reducing atmosphere into a master alloy of pre-determined composition, and in a final step mixed with a predetermined mass of pure silver to produce the new alloy.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 3, 2013
    Inventors: Arthur Taylor, Bernard Madden