Patents by Inventor Greta Johannsen

Greta Johannsen 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).

  • ISOPOROUS MEMBRANE AND METHOD OF PRODUCTION THEREOF
    Publication number: 20090173694
    Abstract: A membrane is produced by dissolving one or more polymers, at least one of which is a block copolymer, in a liquid which includes a solvent, to produce a casting solution. The casting solution is formed into film, and the film is immersed into a precipitation bath which contains at least one non-solvent for the block copolymer so that the film forms a membrane. The membrane is used for filtering a fluid that contains colloidal particles or proteins, and/or for ultrafiltration or nanofiltration, by flowing the fluid through the membrane.
    Type: Application
    Filed: March 13, 2009
    Publication date: July 9, 2009
    Applicant: GKSS-FORSCHUNGZENTRUM GEESTHACHT GMBH
    Inventors: Klaus-Viktor Peinemann, Volker Abetz, Peter F. W. Simon, Greta Johannsen