Patents Assigned to Concoco Inc.
  • Degasification of coal
    Patent number: 4544208
    Abstract: A coal seam is degasified in advance of its being mined by drilling one or more generally horizontal holes from a working face into the seam, and placing a particulate propping agent into the borehole to maintain its integrity.
    Type: Grant
    Filed: July 23, 1984
    Date of Patent: October 1, 1985
    Assignee: Concoco Inc.
    Inventor: Thomas R. Miller