Patents by Inventor Robert C. Herrmann

Robert C. Herrmann 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).

  • Micro and ultrafilters with controlled pore sizes and pore size distribution and methods of making cross-reference to related patent applications
    Publication number: 20020074282
    Abstract: Micro/ultra filtering elements are provided. The filtering elements comprise a support having one or more levels and a porous filtering membrane layer formed thereon comprising sintered ceramic and/or metallic particles of uniform diameters. The membrane may also contain ceramic particles which are disposed in the pores of the membrane. The filtering membrane preferably has an average pore size of from about 0.005 to about 10 micrometers. The filter element is capable of being formed in a variety of geometrical shapes based on the shape of the porous support.
    Type: Application
    Filed: October 25, 2001
    Publication date: June 20, 2002
    Inventors: Robert C. Herrmann, Steven M. Landin
  • Micro and ultrafilters with controlled pore sizes and pore size distribution and methods for making
    Patent number: 6309546
    Abstract: A micro/ultrafiltering element (10) and method for making a filter element are provided. The filtering element comprises a multi-level support (26) having a filtering membrane layer (12) formed thereon comprising sintered particles (14) of uniform diameter. The filtering membrane preferably has an average pore size of from about 0.005-10 micrometers.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: October 30, 2001
    Assignee: Ellipsis Corporation
    Inventors: Robert C. Herrmann, Steven M. Landin