Patents Assigned to Argentum International Incorporated
  • Method for recovering silver from waste photographic film and paper
    Patent number: 4759914
    Abstract: Silver is recovered from photographic emulsion by a process comprising oxidizing whereby the emulsion is oxidized with an acid solution of 10-26 percent ferric chloride at a pH of up to about 2.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: July 26, 1988
    Assignee: Argentum International Incorporated
    Inventor: Harold Messerschmidt