Patents Examined by Wiiliam Krynski
  • Method of preparing membranes from blends of polymers
    Patent number: 5891572
    Abstract: Improved anisotropic fluid separation membranes are prepared from blends of polymers with surface energy differences. The membranes are formulated by processes wherein low surface energy polymer with desirable fluid separation and permeation characteristics is preferentially concentrated in the surface discriminating layer of the membrane.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: April 6, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: James Timothy Macheras, Benjamin Bikson, Joyce Katz Nelson