Patents Assigned to Envirosave USA, Inc.
  • Silver recovery system
    Patent number: 4997166
    Abstract: A sealed, pressurized system for processing silver bearing solutions, such as photographic solutions, for the purpose of removing the silver comprises a series of interconnected sealed containers each of which contains several spaced apart reels or masses of steel wool through which the silver bearing solution is slowly pumped under pressure and intermittently.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: March 5, 1991
    Assignee: Envirosave USA, Inc.
    Inventor: Otis K. Wiggins