Patents by Inventor Dobri D. Dobrev

Dobri D. Dobrev 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).

  • Method of producing nanostructures in membrances, and asymmetrical membrane
    Patent number: 6908552
    Abstract: The invention relates to a method of producing nanostructures in membranes, in which method a membrane consisting of a polymer material is irradiated with charged particles, especially ions, to produce particle tracks. The particle tracks in the membrane are etched using an etching liquid and the etching operation is stopped using a stop liquid, in such a manner that asymmetrical structures are formed. Polyimide is used as the membrane material.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: June 21, 2005
    Assignee: Gesellschaft fuer Schwerionenforschung mbH
    Inventors: Zuzanna Siwy, Dobri D. Dobrev, Reinhard Neumann, Christina Trautmann, Kai Voss
  • Method of producing nanostructures in membrances, and asymmetrical membrane
    Publication number: 20030159985
    Abstract: The invention relates to a method of producing nanostructures in membranes, in which method a membrane consisting of a polymer material is irradiated with charged particles, especially ions, to produce particle tracks. The particle tracks in the membrane are etched using an etching liquid and the etching operation is stopped using a stop liquid, in such a manner that asymmetrical structures are formed. Polyimide is used as the membrane material.
    Type: Application
    Filed: February 26, 2002
    Publication date: August 28, 2003
    Inventors: Zuzanna Siwy, Dobri D. Dobrev, Reinhard Neumann, Christina Trautmann, Kai Voss