Patents by Inventor Stefan Bernhardt

Stefan Bernhardt 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).

  • Gas separation membranes
    Patent number: 8167983
    Abstract: The present invention relates to compositions for producing membranes, the compositions comprising at least 0.1% by weight of highly branched polymer, at least 0.5% by weight of linear polymer and at least 30% by weight of solvent. The present invention additionally describes membranes obtainable from the compositions, and methods of producing these membranes.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: May 1, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Matthias Seiler, Stefan Bernhardt, Rolf Schneider, Roland Wursche, Franz-Erich Baumann
  • PROCESS FOR PREPARING HYPERBRANCHED, DENDRITIC POLYURETHANES BY MEANS OF REACTIVE EXTRUSION
    Publication number: 20110065886
    Abstract: The present invention relates to a process for preparing hyperbranched, dendritic polyurethanes by means of reactive extrusion.
    Type: Application
    Filed: August 13, 2008
    Publication date: March 17, 2011
    Applicant: Evonik Degussa GmbH
    Inventors: Thomas Weihrauch, Stefan Bernhardt, Matthias Seiler, Kerstin Andres, Markus Schwarz, Silvia Herda
  • Deicing agent and/or anti-icing agent
    Patent number: 7875203
    Abstract: The invention relates to a deicing or anti-icing agent containing, based in each case on its total weight, from 35.0% by weight to 95.0% by weight of at least one glycol, from 0.001% by weight to 5.0% by weight of at least one dendritic polymer and from 0.01% by weight to 5.0% by weight of at least one further thickener and optionally water. It furthermore relates to the use of from 0.001 to 5.0% by weight of at least one dendritic polymer and from 0.01% by weight to 5.0% by weight of at least one further thickener for thickening a composition which contains from 35.0% by weight to 95.0% by weight of at least one glycol and optionally water.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: January 25, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Matthias Seiler, Stefan Bernhardt
  • HYDROPHILICIZED HYPERBRANCHED POLYURETHANES
    Publication number: 20100216943
    Abstract: The invention relates to hydrophilicized hyperbranched polyurethanes, to the preparation thereof and to the use thereof as dispersants, in particular for dispersing solids.
    Type: Application
    Filed: September 22, 2008
    Publication date: August 26, 2010
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Pedro Cavaleiro, Sebastian Sonnhalter, Matthias Seiler, Stefan Bernhardt, Markus Schwarz
  • GAS SEPARATION MEMBRANES
    Publication number: 20100071557
    Abstract: The present invention relates to compositions for producing membranes, the compositions comprising at least 0.1% by weight of highly branched polymer, at least 0.5% by weight of linear polymer and at least 30% by weight of solvent. The present invention additionally describes membranes obtainable from the compositions, and methods of producing these membranes.
    Type: Application
    Filed: December 17, 2007
    Publication date: March 25, 2010
    Applicant: Evonik Degussa GmbH
    Inventors: Matthias Seiler, Stefan Bernhardt, Rolf Schneider, Roland Wursche, Franz-Erich Baumann
  • DEICING AGENT AND/OR ANTI-ICING AGENT
    Publication number: 20090309061
    Abstract: The invention relates to a deicing or anti-icing agent containing, based in each case on its total weight, from 35.0% by weight to 95.0% by weight of at least one glycol, from 0.001% by weight to 5.0% by weight of at least one dendritic polymer and from 0.01% by weight to 5.0% by weight of at least one further thickener and optionally water. It furthermore relates to the use of from 0.001 to 5.0% by weight of at least one dendritic polymer and from 0.01% by weight to 5.0% by weight of at least one further thickener for thickening a composition which contains from 35.0% by weight to 95.0% by weight of at least one glycol and optionally water.
    Type: Application
    Filed: July 6, 2007
    Publication date: December 17, 2009
    Applicant: Evonik Degussa GmbH
    Inventors: Matthias Seiler, Stefan Bernhardt
  • HYPER-BRANCHED POLYURETHANES METHOD FOR PRODUCTION AND USE THEREOF
    Publication number: 20090270582
    Abstract: A hyperbranched polyurethane which is obtainable by reacting a diisocyante or polyisocyanate with a triol of the formula (1) where R and R? each independently of one another are hydrogen or an alkyl group having 1 to 4 carbon atoms and where n is an integer greater than 2 and which has a numerical average of at least 4 repeating units of the formula (2) per molecule.
    Type: Application
    Filed: April 3, 2007
    Publication date: October 29, 2009
    Applicant: Evonik Degussa GmbH
    Inventors: Matthias Seiler, Stefan Bernhardt, Markus Schwarz, Friedrich Georg Schmidt, Werner Freitag