Patents by Inventor Ralf Karch

Ralf Karch 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).

  • Cross-linkable mixtures and a method for the production and utilization thereof
    Patent number: 6346562
    Abstract: The invention relates to cross-linkable mixtures and a method for the production and utilization thereof.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: February 12, 2002
    Assignee: General Electric Company
    Inventors: Rolf Haselhorst, Ralf Karch, Klaus Zimmermann
  • Process for the preparation of organosilanes functionalized in the 3-position
    Patent number: 6191297
    Abstract: A process for the preparation of organosilanes functionalized in the 3-position, by the reaction of suitable allyl compounds with hydrogen silanes, using platinum catalysts having one or more sulfur-containing ligands.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: February 20, 2001
    Assignee: Degussa-Huls AG
    Inventors: Christoph Batz-Sohn, Ralf Karch, Steffen Seebald, Matthias Prinz
  • Catalyst layer for polymer electrolyte fuel cells
    Patent number: 6156449
    Abstract: A catalyst layer on a substrate material which contains a proton-conducting polymer (ionomer), electrically conductive carbon particles and fine particles of at least one precious metal. The catalyst layer is obtainable by coating the substrate material with an ink which contains a dispersion of the carbon particles and at least one organic precious metal complex compound in a solution of the ionomer, and drying the coating below a temperature at which the ionomer or the substrate material is thermally damaged, the precious metals in the complex compounds being present with an oxidation number of 0 and the complex compounds being thermally decomposed during drying to form the fine precious metal particles.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: December 5, 2000
    Assignee: Degussa-Huls Aktiengellschaft
    Inventors: Ralf Zuber, Ralf Karch, Knut Fehl, Karl-Anton Starz
  • Method of producing propylsilanes
    Patent number: 6153782
    Abstract: A method for the production of organosilanes functionalized in 3-position by reacting suitable allyl compounds with hydrogen silanes in the presence of a multielement catalyst containing platinum and at least one other element.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: November 28, 2000
    Assignee: Degussa-Huls AG
    Inventors: Thomas Krauter, Steffen Seebald, Christoph Batz-Sohn, Ralf Karch, Matthias Prinz, Hermanus Gerhardus Jozef Lansink Rotgerink