Patents Assigned to Otisca Industries Limited
  • Coal recovery process
    Patent number: 4248698
    Abstract: Agglomeration type processes for recovering coal in which calcium oxide is employed to bring about an effective separation of pyritic sulfur from the coal.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: February 3, 1981
    Assignee: Otisca Industries Limited
    Inventor: Douglas V. Keller, Jr.