Patents by Inventor Marion Scherf

Marion Scherf 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).

  • Synthetic hydrophilic membranes and method for their manufacture
    Patent number: 5246582
    Abstract: A synthetic hydrophilic membrane, and method for manufacturing thereof, in the form of hollow fibers or flat membranes for dialysis and/or ultrafiltration, containing a mixture of polysulfone and sulfonated polysulfone, the mixture containing 65 to 95 wt.% sulfonated polysulfone, possibly as a salt of sulfonic acid, and 35 to 5 wt.% unsulfonated polysulfone. Preferably, up to 12 wt.% water-soluble polymers, based on the total mixture, are added to the mixture of polysulfone and sulfonated polysulfone before formation of the membrane.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: September 21, 1993
    Assignee: Akzo N.V.
    Inventors: Heinz-Dieter Sluma, Jurgen Passlack, Brigitte Buttner, Marion Scherf