Patents by Inventor Erich Steinwender

Erich Steinwender 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).

  • Alkylation of crosslinked polymers containing N or amino or ammonium groups
    Patent number: 7148319
    Abstract: The invention relates to a method for alkylating cross-linked polymers containing N- or amino, ammonium or spiro-bicyclic ammonium groups. According to said method, the gelated polymers, obtained by polymerization and cross-linking, are a) optionally, deprotonated in water, an organic solvent or in a mixture of an organic solvent and water, by adding a base, b) optionally, washed once or more with water, an organic solvent or a mixture of an organic solvent and water, then c) one or more alkylators are added to the gel suspension which is stirred in water, an organic solvent or in a mixture of an organic solvent and water, at a temperature of between 5 and 160° C. at normal or increased pressure, with a base being added after a short mixing time and d) reprotonation is carried out using a mineral acid, optionally after one or more washing steps, resulting in the alkylated, cross-linked polymers containing N- or amino, ammonium or spirobicyclic ammonium groups, accordingly.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: December 12, 2006
    Assignee: DSM Fine Chemicals Austria Nfg GmbH & Co KG
    Inventors: Michael Stanek, Erich Steinwender
  • Process for the continuous drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups
    Patent number: 7057010
    Abstract: Process for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, in which the gelled and washed polymers obtained by polymerization, crosslinkage and optionally alkylation are dried continuously using a gaseous medium under normal pressure or overpressure in a fluidized bed.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: June 6, 2006
    Assignee: DSM Fine Chemcials NFG GmbH & Co KG
    Inventors: Michael Stanek, Georg Häubl, Walter Raml, Erich Steinwender
  • Process for the continuous drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups
    Publication number: 20040143988
    Abstract: Process for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, in which the gelled and washed polymers obtained by polymerization, crosslinkage and optionally alkylation are dried continuously using a gaseous medium under normal pressure or overpressure in a fluidized bed.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 29, 2004
    Inventors: Michael Stanek, Georg Haubl, Walter Raml, Erich Steinwender
  • Alkylation of crosslinked polymers contaning n or amino or ammonium groups
    Publication number: 20040028803
    Abstract: The invention relates to a method for alkylating cross-linked polymers containing N- or amino, ammonium or spiro-bicyclic ammonium groups. According to said method, the gelated polymers, obtained by polymerization and cross-linking, are a) optionally, deprotonated in water, an organic solvent or in a mixture of an organic solvent and water, by adding a base, b) optionally, washed once or more with water, an organic solvent or a mixture of an organic solvent and water, then c) one or more alkylators are added to the gel suspension which is stirred in water, an organic solvent or in a mixture of an organic solvent and water, at a temperature of between 5 and 160° C. at normal or increased pressure, with a base being added after a short mixing time and d) reprotonation is carried out using a mineral acid, optionally after one or more washing steps, resulting in the alkylated, cross-linked polymers containing N- or amino, ammonium or spirobicyclic ammonium groups, accordingly.
    Type: Application
    Filed: May 22, 2003
    Publication date: February 12, 2004
    Inventors: Michael Stanek, Erich Steinwender
  • Method for producing substituted pyridine-carboxylic acids
    Patent number: 6346623
    Abstract: An improved process for the preparation of substituted pyridinecarboxylic acids (II), useful as herbicide intermediates, by ozonolysis of quinolines (I).
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: February 12, 2002
    Assignee: DSM Fine Chemicals Austria Nfg GmbH & CoKG
    Inventors: Gerhard Steinbauer, Curt Zimmermann, Ernst Wressnegger, Erich Steinwender
  • Purification of lipstatin
    Patent number: 6156911
    Abstract: The present invention relates to a method for the purification of the lipstatin.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: December 5, 2000
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Stephan Doswald, Ernst Kupfer, Gerhard Steinbauer, Erich Steinwender