Patents by Inventor Derek R. Wall

Derek R. Wall 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).

  • Fuel composition and method for its preparation
    Patent number: 4276053
    Abstract: A stable, uniform solvent refined coal (SRC)--oil dispersion is prepared by grinding 15 to 55% by weight of SRC particles in the absence of free oxygen in a medium consisting essentially of gas oil and/or a heavier petroleum fraction. Grinding is continued until the size of the majority of the particles is reduced to a value in the range 1 to 10 micron. Preferably the SRC is uniformly dispersed in the gas oil and/or heavier petroleum fraction prior to grinding.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: June 30, 1981
    Assignee: The British Petroleum Company Limited
    Inventors: Christopher J. Veal, Derek R. Wall