Patents by Inventor Matyas Korosi

Matyas Korosi 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).

  • Recovery of silver from gelatinous photographic wastes
    Patent number: 3982932
    Abstract: Silver is recovered from photographic waste liquids containing emulsified silver, silver compounds, and gelatin by reacting therewith a proteolytic enzyme while the reactants are maintained in an alkaline condition. Then the reactants are acidified to a pH of 4.2 or less by introducing an acid such as HCl or H.sub.2 SO.sub.4. Precipitation of gelatin-bound silver and silver compounds occurs upon acidification, and the precipitate is allowed to settle out in a settling tank. Supernatant liquid is removed from the top, neutralized and sent to sewer. Settled sludge is removed from the bottom and silver recovered, as by incineration. The operation can be conducted either batch-wise or continuously.
    Type: Grant
    Filed: August 22, 1972
    Date of Patent: September 28, 1976
    Assignee: Eastman Kodak Company
    Inventor: Matyas Korosi