Patents by Inventor Alan G. Hopkinson

Alan G. Hopkinson 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 Compositions
    Publication number: 20080166260
    Abstract: Silver alloy compositions having reduced susceptibility to sulphidation and reduced susceptibility to fire stain relative to 92.5% silver 7.5% copper alloy, and having mechanical properties for casting and forming comparable to or better than 92.5% silver 7.5% copper alloy, and having an appearance similar to 92.5% silver 7.5% copper alloy. The silver alloy compositions include at least 92.5% silver 2.0%-4.0% tin; 1.7%-2.6% zinc and 0.50%-1.5% indium.
    Type: Application
    Filed: February 3, 2006
    Publication date: July 10, 2008
    Applicants: CARRS OF SHEFFIELD (MANUFACTURING) LIMITED, SHEFFIELD HALLAM UNIVERSITY, CENTRE STEPHANOIS DE RECHERCHES MECANIQUES
    Inventors: Frederic Faverjon, Alan G. Hopkinson, James Storey