Patents by Inventor Frank Schweigharett

Frank Schweigharett 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).

  • Time phased alternate blending of feed coals for liquefaction
    Patent number: 4518479
    Abstract: The present invention is directed to a method for reducing process performance excursions during feed coal or process solvent changeover in a coal hydroliquefaction process by blending of feedstocks or solvents over time.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: May 21, 1985
    Assignee: International Coal Refining Company
    Inventors: Frank Schweigharett, David S. Hoover, Diwaker Garg