Patents by Inventor Gerd Pruefer

Gerd Pruefer 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).

  • Patent number: 5716741
    Abstract: The present invention concerns stepped mould inserts, a method of producing the same and high-precision stepped microstructure bodies moulded therewith. The present stepped mould inserts and method of producing the same are more simple than previous methods. The lithographically produced regions of a patterned resist layer, which are exposed by development on a flat plate, are filled with metal. The layer may be mechanically removed, down to a predetermined thickness. After the residues of the resist have been dissolved out, if necessary or desired, this operation is repeated from one to several times. The regions removed from the resist layer are filled with metal, covered and separated from the resist layer, thus providing a multistep metallic mould insert. High-precision microstructure bodies having a multistep structure are produced with the present stepped mould insert.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: February 10, 1998
    Assignee: MicroParts Gesellschaft fur Mikrostrukturtechnik mbH
    Inventors: Holger Reinecke, Arnd Rogner, Friedolin Franz Noeker, Ulrich Sieber, Gerd Pruefer, Helge Pannhoff, Uwe Brenk