Patents by Inventor Thieo E. Hogen-Esch

Thieo E. Hogen-Esch 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 for the fabrication of homogenous blends of polystyrenesulfonic acid and polyvinylidene fluoride suitable for the application in direct oxidation methanol fuel cells (DMFCs)
    Patent number: 10586995
    Abstract: A membrane electrode assembly includes an anode catalyst layer, a cathode catalyst layer, and a polymeric blend proton exchange membrane interposed between the anode catalyst layer and the cathode catalyst layer. The polymeric blend proton exchange membrane includes a scaffold polymer and a polyacid polymer. The polyacid polymer being formed from a polyacid polymer precursor. Characteristically, the scaffold polymer and the polyacid polymer precursor have matching solubility parameters.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: March 10, 2020
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Thieo E. Hogen-Esch, Ming Li, Surya G. K. Prakash
  • New Method for the Fabrication of Homogenous Blends of Polystyrenesulfonic Acid and Polyvinylidene Fluoride Suitable For The Application In Direct Oxidation Methanol Fuel Cells (DMFCs)
    Publication number: 20160049678
    Abstract: A membrane electrode assembly includes an anode catalyst layer, a cathode catalyst layer, and a polymeric blend proton exchange membrane interposed between the anode catalyst layer and the cathode catalyst layer. The polymeric blend proton exchange membrane includes a scaffold polymer and a polyacid polymer. The polyacid polymer being formed from a polyacid polymer precursor. Characteristically, the scaffold polymer and the polyacid polymer precursor have matching solubility parameters.
    Type: Application
    Filed: August 18, 2015
    Publication date: February 18, 2016
    Inventors: Thieo E. HOGEN-ESCH, Ming LI, Surya G. K. PRAKASH
  • Method for preparing (co)polymers having a narrow molecular weight distribution
    Patent number: 6303722
    Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium salt of a nitrogen, oxygen and/or sulfur anion. The present invention also concerns block copolymer and methods of making the same using anionic polymerization in the presence of the phosphonium salt to prepare at least one block of the copolymer.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: October 16, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Christof Mehler, Thieo E. Hogen-Esch, Axel Müller, Angela Zagala
  • Method for preparing (co) polymers by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aromatic ring
    Patent number: 6143847
    Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aromatic ring as substituent on the phosphorous atom.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: November 7, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thieo E. Hogen-Esch, Dimo K. Dimov, Stephan Jungling, Volker Warzelhan, Hermann Gausepohl
  • Nitrogen-containing metal-free initiators for anionic polymerization of acrylates
    Patent number: 6107424
    Abstract: A method for preparing a polymer, comprising the step of polymerizing a monomer of the formula ##STR1## in the presence of a specific initiator containing at least one amino subotituent and one aromatic substituent on a phosphorus atom.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: August 22, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Jungling, Thieo E. Hogen-Esch, Dimo Dimov, Axel H. E. Muller, Herbert Konigsmann
  • Process for applying a sealant composition
    Patent number: 4746544
    Abstract: In repairing a rupture or opening as described herein the rupture or opening and the adjacent area of the surface in which the rupture or opening occurs is covered by a layer of an alpha-cyanoacrylate which is liquid at 20.degree. C. and has the formula CH.sub.2 .dbd.C(CN)--COOR wherein R is a hydrocarbon radical selected from the group consisting of aliphatic, aromatic and cycloaliphatic hydrocarbon groups of 1-10 carbon atoms and alkoxy, chloro and fluoro derivatives of said hydrocarbon groups in which alkoxy groups there are 1-4 carbon atoms therein; and spreading on the said layer of alpha-cyanoacrylate a layer of a powder comprising rubber.
    Type: Grant
    Filed: January 2, 1987
    Date of Patent: May 24, 1988
    Assignee: Renbec International Corp.
    Inventor: Thieo E. Hogen-Esch
  • Water-soluble graft copolymers of starch-acrylamide and uses therefor
    Patent number: 4400496
    Abstract: Graft copolymers having starch as the central chain with grafted side chains of acrylamide or acrylamide-acrylic acid, and a process for preparation of such copolymers in the presence of Ce.sup.+4 or other redox initiators. These copolymers are employed in preparing highly viscous aqueous solutions that are particularly useful in oil recovery from subterranean wells.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: August 23, 1983
    Assignee: University of Florida
    Inventors: George B. Butler, Thieo E. Hogen-Esch, John J. Meister, Huey Pledger, Jr.