Patents Assigned to Leas Brothers Development Corporation
  • Coal conversion process
    Patent number: 4078989
    Abstract: A process for the conversion of carbonaceous materials such as coal, tar sands or the like to clean liquid and gaseous fuels.
    Type: Grant
    Filed: May 11, 1976
    Date of Patent: March 14, 1978
    Assignee: Leas Brothers Development Corporation
    Inventor: Arnold Marcel Leas
  • Direct metal reduction from coal
    Patent number: 3985548
    Abstract: A process for continuously and simultaneously extracting liquids from coal, gasifying the carbon to carbon monoxide and utilizing the carbon monoxide for the direct reduction of iron ore. The process is carried out by continuously conveying a mixture of iron ore, coal and oil in a moving solids bed through a single reactor tower, divided into a plurality of contiguous, communicating treatment zones.
    Type: Grant
    Filed: May 30, 1972
    Date of Patent: October 12, 1976
    Assignee: Leas Brothers Development Corporation
    Inventors: Lawrence Earl Leas, Robert Lamar Leas, Arnold Marcel Leas