Patents Assigned to Hallmark Sweet, Inc.
  • Gold alloy compositions formed by environmentally friendly process
    Patent number: 8419867
    Abstract: Rose-color and yellow-color gold alloys are formed from a gold-base alloy containing silver and copper. Mining these elements is usually highly detrimental to the environmental. Environmentally friendly alloys are obtained through the use of recycled elements and elements recovered from mines utilizing specific guidelines. Jewelry manufactured from these environmentally friendly alloys may be more receptive to a consumer, resulting in a competitive advantage.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: April 16, 2013
    Assignee: Hallmark Sweet, Inc.
    Inventors: Dwarika P. Agarwal, Grigory Raykhtsaum, Richard V. Carrano