Patents by Inventor Richard D. Pick

Richard D. Pick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for concentrating the exinite group macerals from coal by froth flotation
    Patent number: 4377473
    Abstract: A method for separating the exinite group macerals from the total coal by froth flotation in the presence of at least one short chain alcohol frothing agent and at least one methyl polyglycol type frothing agent in a first froth flotation zone to produce an exinite and other coal maceral-rich stream which is thereafter subjected to froth flotation in a second froth flotation zone in the presence of a short chain alcohol frothing agent to produce an exinite group maceral-rich stream and a stream rich in other coal macerals with the exinite-rich stream thereafter being mixed with an additional quantity of a short chain alcohol frothing agent and passed to a third froth flotation zone to produce an exinite group maceral group concentrate stream which is thereafter processed to produce a particulate exinite maceral group concentrate.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: March 22, 1983
    Assignee: Atlantic Richfield Company
    Inventors: Timothy J. Laros, Richard D. Pick
  • Recovery of uranium from carbonate leach solutions
    Patent number: 4092399
    Abstract: The present invention relates to the recovery of uranium from carbonate leach solutions. More particularly, it relates to the recovery of uranium from ammonium carbonate leach solutions having molybdenum as an impurity.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: May 30, 1978
    Assignee: Atlantic Richfield Company
    Inventors: Kailash Narayan, Richard D. Pick