Patents by Inventor Johann Doppelberger

Johann Doppelberger 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).

  • Dispersion which contains at least 2 types of particles
    Patent number: 7901502
    Abstract: Aqueous dispersions contain at least two chemically different particle types having a diameter on average of less than 100 ?m. The dispersions are resistant to sedimentation and gelling for long periods of time, and can be used for many purposes, such as the polishing of optical surfaces, and in paints and adhesives.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: March 8, 2011
    Assignee: Wacker Chemie AG
    Inventors: Herbert Barthel, Johann Doppelberger, Mario Heinemann, Torsten Gottschalk-Gaudig, Stephan Loskot, Ute Voelkel
  • Dispersion which contains at least 2 types of particles
    Publication number: 20050133766
    Abstract: Aqueous dispersions contain at least two chemically different particle types having a diameter on average of less than 100 ?m. The dispersions are resistant to sedimentation and gelling for long periods of time, and can be used for many purposes, such as the polishing of optical surfaces, and in paints and adhesives.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 23, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Herbert Barthel, Johann Doppelberger, Mario Heinemann, Torsten Gottschalk-Gaudig, Stephan Loskot, Ute Voelkel
  • Interference pigments comprising molecules fixed in a cholesteric configuration, and use thereof
    Patent number: 5851604
    Abstract: The invention relates to interference pigments comprising molecules fixed in a cholesteric configuration, and to the use thereof. The pigments of the invention have a plateletlike structure and a thick ness of from 1 .mu.m to 20 .mu.m. They contain oriented, crosslinked substances with a liquid-crystalline structure having a chiral phase.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: December 22, 1998
    Assignee: Consortium fur elektrochemische Industrie GmbH
    Inventors: Christoph Muller-Rees, Silvia Jung, Johann Doppelberger, Walter Goeblmeier
  • Process for preparing highly dispersed metal oxides whose surfaces are modified by an ammonium-functional organopolysiloxane as a positive chargeable controlling agent for toners
    Patent number: 4902570
    Abstract: The invention relates to a process for preparing highly dispersed metal oxides whose surfaces are modified by an ammonium-functional organopolysiloxane as a charge controlling substance for positive chargeable toners, in which the highly dispersed metal oxides are reacted with an organopolysiloxane which contains silicon-bonded terminal hydroxyl and/or alkoxy groups, diorganosiloxane units, in which the two organic radicals are monovalent hydrocarbon radicals, and siloxane units in which the organic radicals contain a positive charged nitrogen which is bonded to silicon via carbon.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: February 20, 1990
    Assignee: Wacker-Chemie GmbH
    Inventors: Mario Heinemann, Johann Bindl, Johann Doppelberger, Hans P. Scherm