Patents Assigned to Tusco, Incorporated
  • Method for displacing oxygen from a mine
    Patent number: 4842444
    Abstract: A method for preventing the formation of acidic mine water wherein inert gas in introduced into a mine cavity under positive pressure to displace oxygen contained therein. Upon detection of the displacement of substantially all of the oxygen from within the mine cavity, the mine cavity is permitted to flood and seal with water.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: June 27, 1989
    Assignee: Tusco, Incorporated
    Inventor: Philip B. Cowan