Patents by Inventor Graham J. Parker

Graham J. Parker 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).

  • Dental amalgam alloy
    Patent number: 4859240
    Abstract: The present invention relates to a dental amalgam alloy comprising by weight, as alloying ingredients, from about 30 to 70% silver, from about 20 to 35% tin, from about 10 to 30% cooper, from 0 to about 5% indium, from 0 to about 1% zinc and from about 0.01 to 2% of a Group VIII metal selected from the group consisting of platinum, rhodium, iridium and ruthenium.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: August 22, 1989
    Assignee: Jeffery James Cheetham
    Inventor: Graham J. Parker
  • Dental amalgam alloy
    Patent number: 4686082
    Abstract: The present disclosure relates to a dental amalgam alloy comprising by weight, as alloying ingredients, from about 30 to 70% silver, from about 20 to 35% tin, from about 10 to 30% copper, from 0 to about 5% indium, from 0 to about 1% zinc and from about 0.01 to 2% of a Group VIII metal selected from the group consisting of platinum, rhodium, iridium and ruthenium.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: August 11, 1987
    Assignee: Jeffery J. Cheetham
    Inventor: Graham J. Parker