Patents by Inventor Paul A. Daus

Paul A. Daus 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).

  • Process for separating natural gas and carbon dioxide
    Patent number: 6128919
    Abstract: A process for separating natural gas and carbon dioxide from a raw feed stream, such as in carbon dioxide for EOR processes. Separation is by membrane separation at low pressures. By utilizing low pressure separation, highly selective membranes can be used and recycling becomes practical.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: October 10, 2000
    Assignee: Messer Griesheim Industries, Inc.
    Inventors: Paul A. Daus, Charles R. Pauley, deceased
  • Membrane process for producing carbon dioxide
    Patent number: 6085549
    Abstract: A process for producing carbon dioxide from a gas stream containing same pretreats the incoming raw gas to remove contaminants and particularly to protect degradation of the membranes utilized for separation. The temperatures of the various gas streams are carefully controlled to reduce water from the stream. By-product and other gas streams of the process are recycled in order to increase efficiency by utilizing the heating or cooling properties of the streams. In addition, streams containing minor portions of carbon dioxide are returned to the system for recovery.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: July 11, 2000
    Assignee: Messer Griesheim Industries, Inc.
    Inventors: Paul A. Daus, Charles R. Pauley, John W. Koenst, Fred Coan