Patents by Inventor Martin D. Hilmar

Martin D. Hilmar 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 of forming separation membranes
    Patent number: 5310414
    Abstract: Gas mixtures such as H.sub.2 /CO.sub.2 may be separated by passage through a filter bed of nanocrystalline ceramic particles on a bed of alumina particles.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: May 10, 1994
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Robert S. Averback, Uygur Kokturk, Martin D. Hilmar
  • Separation by membrane techniques
    Patent number: 5183482
    Abstract: Mixture of gases such as hydrogen/carbon dioxide may be separated by use of membrane formed by reaction of an aluminum alkoxide with steam at high temperatures and pressures.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: February 2, 1993
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Martin D. Hilmar
  • Method of forming membranes useful for separation of gases
    Patent number: 5160352
    Abstract: A porous support layer is loaded with blocking liquid, such as an alcohol, prior to contact with an aluminum alkoxide to form thereon a layer of alumina which is dried and calcined to yield a membrane suitable for separation of gases.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: November 3, 1992
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Martin D. Hilmar
  • Membrane separation of gases
    Patent number: 5139540
    Abstract: Mixture of gases such as hydrogen/carbon dioxide may be separated by use of membrane formed by reaction of an aluminium alkoxide with water vapor at high temperatures and pressures.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: August 18, 1992
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Uygur Kokturk, Martin D. Hilmar, Jeffrey C. Templeton
  • Variable length membrane module
    Patent number: 4808309
    Abstract: This invention provides a variable length membrane module for separation of fluids in solution. The module comprises a series of hollow fiber membranes, a tubing surrounding the series of hollow membranes, an outer steel tube encasing the series of hollow membranes and a pair of nuts arranged to engage the tubing to adjust the length of the hollow fiber membranes to allow proper passage of the fluids therethrough.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: February 28, 1989
    Assignee: Texaco Inc.
    Inventors: Richard F. Beaupre, Richard P. Guptill, Martin D. Hilmar