Patents by Inventor Gary L. Hamilton

Gary L. Hamilton 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).

  • Solvent refining of residues
    Patent number: 4795551
    Abstract: In the solvent refining of a residual oil, a mixture of refined oil and refining solvent, and a mixture of pitch impurities and refining solvent are introduced into separate zones of a combination tower operated at a pressure of no greater than 100 psig to recover refining solvent from each of the mixtures. The combination tower is preferably A modified crude distillation tower from a preexisting crude unit, whereby idle crude units may be converted to solvent refining.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: January 3, 1989
    Assignee: Lummus Crest, Inc.
    Inventors: Gary L. Hamilton, Andrei Rhoe, Donald P. Satchell
  • Solvent for refining of residues
    Patent number: 4592831
    Abstract: Solvent refining of a residual oil is accomplished with a refining solvent containing methanol and propanol, preferably isopropanol. The solvent produces high yields of a high quality refined oil, as well as a pumpable pitch fraction.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: June 3, 1986
    Assignee: Lummus Crest Inc.
    Inventors: Andrei Rhoe, Joseph A. Pisani, Gary L. Hamilton, George D. Suciu