Patents Assigned to John C. Wright
  • Disposal of liquid waste and recovery of metals therefrom
    Patent number: 4255067
    Abstract: Industrial liquid wastes containing low concentrations of heavy metals are applied to a soil bed where evaporation of the liquid occurs. The soil bed is lined with a liquid-impermeable liner of polymeric sheet material, bentonite clay or a laminate of the two to prevent escape of the liquid waste to the surrounding environment. After repeated applications of wastes to the bed, the concentration of metals in the bed reaches a level where the metals may be recovered by standard mining operations.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: March 10, 1981
    Assignee: John C. Wright
    Inventor: John C. Wright