Patents by Inventor Stephen R. Dunn

Stephen R. Dunn 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).

  • Method for extracting and upgrading of heavy and semi-heavy oils and bitumens
    Patent number: 8372347
    Abstract: Improvements in the selective extraction of relatively low molecular weight oils from coal, coal liquids, oil shales, shale oils, oil sands, heavy and semi-heavy oils, bitumens, and the like are provided by a continuous process involving contacting the material to be treated with supercritical water in a continuous operation at pressures of from 500 psi to 3000 psi, temperatures of 250° C. to 450° C., and in-reactor dwell times generally in excess of 25 seconds and up to 10 minutes.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: February 12, 2013
    Assignee: Yeda Research and Development Co. Ltd
    Inventors: Brian Berkowitz, Stephen R. Dunn, Ishai Dror
  • METHOD FOR EXTRACTING AND UPGRADING OF HEAVY AND SEMI-HEAVY OILS AND BITUMENS
    Publication number: 20110266115
    Abstract: Improvements in the selective extraction of relatively low molecular weight oils from coal, coal liquids, oil shales, shale oils, oil sands, heavy and semi-heavy oils, bitumens, and the like are provided by a continuous process involving contacting the material to be treated with supercritical water in a continuous operation at pressures of from 500 psi to 3000 psi, temperatures of 250° C. to 450° C., and in-reactor dwell times generally in excess of 25 seconds and up to 10 minutes.
    Type: Application
    Filed: April 11, 2011
    Publication date: November 3, 2011
    Inventors: Brian Berkowitz, Stephen R. Dunn, Ishai Dror
  • Method to follow progression of kidney disease
    Publication number: 20030059956
    Abstract: The present invention relates to methods of measuring urinary TGF-&bgr; levels to monitor disease progression in patients having chronic fibrotic diseases or kidney diseases, more particularly, methods of preparing urine specimens for measuring urinary TGF-&bgr; levels in patients having chronic fibrotic diseases or kidney diseases.
    Type: Application
    Filed: May 3, 2002
    Publication date: March 27, 2003
    Inventors: Kumar Sharma, Tracy A. McGowan, Stephen R. Dunn, Bonita Falkner