Patents by Inventor Dirk C. Weyenberg

Dirk C. Weyenberg 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).

  • Hydrophilic membrane, process for producing a hydrophilic membrane
    Patent number: 5122273
    Abstract: A membrane for membrane filtration is disclosed, comprising a polymer matrix formed by coagulation with a liquid coagulant from a casting syrup, which polymer matrix is linked to hydrophilic groups belonging to a compound which has a hydrophilic chain section, is not coagulated by the liquid coagulant, is coupled on either side to a hydrophobic chain, is anchored in the polymer matrix by non-chemical bonding, and is composed of a compound which has a molecular weight of at least 2000 and can be used as a thickening agent.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: June 16, 1992
    Assignee: Stork Friesland B. V.
    Inventors: Casper J. N. Rekers, Gerrit J. Snijders, Arie Zwijnenburg, Dirk C. Weyenberg