Patents by Inventor Karl Henke

Karl Henke 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).

  • Polyacrylonitrile membrane
    Patent number: 5290448
    Abstract: An asymmetric semipermeable membrane for dialysis and/or ultrafiltration is composed of a copolymer of acrylonitrile and acrylic ester and an ionic or ionizable monomer in the form of a hollow fiber. The copolymer is composed of 90.50 to 95.00 wt. % acrylonitrile, 4.99 to 8.60 wt. % acrylic ester, and 0.01 to 0.90 wt. % of the ionic or ionizable monomer. Also provided is a process for its manufacture.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: March 1, 1994
    Assignee: Akzo NV
    Inventors: Heinz-Dieter Sluma, Jurgen Passlack, Harald Schmitt, Walter Loffelmann, Karl Henke