Patents by Inventor Paul W. Kramer

Paul W. Kramer 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).

  • Membranes having enhanced selectivity and method of producing such membranes
    Patent number: 5215554
    Abstract: Glassy polymeric gas separation membranes are chemically modified throughout the thickness thereof. Such membranes manifest selectivity for a pair of gases which is greater than the intrinsic selectivity of the glassy polymeric material and which is greater than the equilibrium intrinsic selectivity of the chemically modified glassy polymeric material.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: June 1, 1993
    Assignee: Permea, Inc.
    Inventors: Paul W. Kramer, Milton K. Murphy, Donald J. Stookey, Jay M. S. Henis, Erwin R. Stedronsky