Patents by Inventor Frank M. Floyd

Frank M. Floyd 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).

  • Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials
    Patent number: 4450066
    Abstract: Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by hydrothermal pretreatment. The said pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The said pretreatment is accomplished at a total pressure within the range from about 1000 to about 4400 psia. Temperature during said pretreatment will generally be within the range from about 500.degree. to about 700.degree. F.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: May 22, 1984
    Assignee: Exxon Research and Engineering Co.
    Inventors: John B. Stone, Frank M. Floyd