Patents Assigned to Nippon Evr Limited
  • Method for regenerating waste developers used for processing silver halide photographic materials and method for storing developers
    Patent number: 4089760
    Abstract: A method for regenerating a spent developer used for processing silver halide photographic materials which comprises electrolyzing the spent developer using an electrolytic cell including an ion exchange membrane and composed of a cathode compartment and an anode compartment with the anode and the cathode being separated from each other by an anion exchange membrane, while charging the spent developer into the cathode compartment and an electrolytic solution into the anode compartment.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: May 16, 1978
    Assignee: Nippon Evr Limited
    Inventor: Takezo Ono