Patents Assigned to Wayne K. Rice
  • Apparatus for carrying out extractions in subterranean well
    Patent number: 4929348
    Abstract: The present invention relates generally to improvements in processes and apparatus for effecting solvent extractions using liquefied gas or gases in the supercritical state as the solvents and specifically to continuous processes for carrying out such extractions at high pressures. Further, the present invention relates to an apparatus which is a long vertical cylinder of relatively small diameter, wherein the solvent gas and the material to be extracted are continuously circulated through the long vertical reactor.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: May 29, 1990
    Assignee: Wayne K. Rice
    Inventor: Wayne K. Rice