Patents Assigned to Algas Resources Ltd.
  • Method for recovering methane from coal seams
    Patent number: 4305464
    Abstract: Methane is recovered from an underground coal seam via a borehole which extends from the earth's surface through the overburden to a cavity that is in, partly in or proximate to the coal seam. The cavity is constructed and arranged to be collapsible. Coal from the coal seam moves toward the coal seam under the influence of triaxial compression converting adsorbed methane to free form methane that is recovered.
    Type: Grant
    Filed: March 7, 1980
    Date of Patent: December 15, 1981
    Assignee: Algas Resources Ltd.
    Inventor: Denes G. Masszi