Patents by Inventor Anneliese Grobe

Anneliese Grobe 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).

  • Polymer membranes on the basis of polyvinylidene fluoride, a process for the production thereof and their use
    Patent number: 5151193
    Abstract: The present invention relates to polymer membranes on the basis of polyviidene fluoride (PVDF), a process for the production thereof and their use for ultrafiltration. The membranes are produced according to known techniques from homogeneous solutions containing 5 to 30% by weight of PVDF and 0.01 to 30% by weight of sulfonic acids and/or their salts, obtainable by sulfonation of the polyetheretherketones of formula (I) and/or subsequent neutralization of the sulfonic acids. The membranes are then treated with methanolic solutions containing 0.1 to 5% by weight of the above-mentioned sulfonic acids and/or their salts. This process supplies membranes having excellent hydrophilic properties, high thermal and mechanical stabilities and high trans-membrane flows.--(--O--p--C.sub.6 H.sub.4 --O--p--C.sub.6 H.sub.4 --CO--p--C.sub.6 H.sub.4 --).sub.
    Type: Grant
    Filed: November 2, 1990
    Date of Patent: September 29, 1992
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung EV
    Inventors: Anneliese Grobe, Horst Chmiel