Patents by Inventor Michael E. Prudich

Michael E. Prudich 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).

  • Prevention of deleterious deposits in a coal liquefaction system
    Patent number: 4457826
    Abstract: A process for preventing the formation of deleterious coke deposits on the walls of coal liquefaction reactor vessels involves passing hydrogen and a feed slurry comprising feed coal and recycle liquid solvent to a coal liquefaction reaction zone while imparting a critical mixing energy of at least 3500 ergs per cubic centimeter of reaction zone volume per second to the reacting slurry.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: July 3, 1984
    Assignee: The Pittsburg & Midway Coal Mining Co.
    Inventors: Norman L. Carr, Michael E. Prudich, William E. King, Jr., William G. Moon
  • Coal liquefaction process
    Patent number: 4377464
    Abstract: A C.sub.5 -900.degree. F. (C.sub.5 -482.degree. C.) liquid yield greater than 50 weight percent MAF feed coal is obtained in a coal liquefaction process wherein a selected combination of higher hydrogen partial pressure, longer slurry residence time and increased recycle ash content of the feed slurry are controlled within defined ranges.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: March 22, 1983
    Assignee: The Pittsburg & Midway Coal Mining Co.
    Inventors: Norman L. Carr, William G. Moon, Michael E. Prudich