Patents by Inventor Paul C. F. Chan

Paul C. F. Chan 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).

  • Supercritical multicomponent solvent coal extraction
    Patent number: 4388171
    Abstract: The yield of organic extract from the supercritical extraction of coal with larger diameter organic solvents such as toluene is increased by use of a minor amount of from 0.1 to 10% by weight of a second solvent such as methanol having a molecular diameter significantly smaller than the average pore diameter of the coal.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: June 14, 1983
    Inventors: James M. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Beggs, William H. Corcoran, William S. Fong, Puvin Pichaichanarong, Paul C. F. Chan, Daniel D. Lawson