Patents Assigned to Exxon Coal USA, Inc.
  • Inclined surface mining method
    Patent number: 5154489
    Abstract: There is disclosed a method of surface mining wherein a continuous surface miner is moved up and down an inclined surface to remove adjacent strips of material, which may be valuable commodity and/or waste, and the excavated material is transferred to a mobile conveyor which extends along the inclined surface generally parallel to the continuous surface miner.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: October 13, 1992
    Assignee: Exxon Coal USA, Inc.
    Inventor: Marc Lemieux