Patents Assigned to Ramparts Tractor Parts Limited
  • Recovery silver from photo sensitive materials
    Patent number: 5071476
    Abstract: A system for recovering silver from photographic film comprises a wash mixer adapted to hold the film and wash water comprising water, a proteolytic enzyme and a floculant. The mixer is adapted to rotate about its longitudinal axis and comprises spiral fins disposed at the inside surface thereof and a swivel joint coaxial with the axis of rotation.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: December 10, 1991
    Assignees: Mini Labs Limited, Ramparts Tractor Parts Limited
    Inventor: Richard A. McLeod