Patents by Inventor Stephan Ratsch

Stephan Ratsch 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).

  • Patent number: 7074941
    Abstract: 2-Alkyl-3-aryl- or -heteroaryloxaziridines are prepared in a particularly advantageous manner by oxidizing corresponding N-alkyl-aryl- or -heteroarylaldimines with an aromatic percarboxylic acid or a salt thereof in the presence of water, a water-soluble base, and a water-miscible solvent, at temperatures below 30° C. Using this method, it is also possible to obtain novel 2-alkyl-3-aryloxaziridines.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: July 11, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alexander Klausener, Reinhard Langer, Stephan Ratsch, Michael Dockner
  • Publication number: 20040198990
    Abstract: 2-Alkyl-3-aryl- or -heteroaryloxaziridines are prepared in a particularly advantageous manner by oxidizing corresponding N-alkyl-aryl- or -heteroarylaldimines with an aromatic percarboxylic acid or a salt thereof in the presence of water, a water-soluble base, and a water-miscible solvent, at temperatures below 30° C. Using this method, it is also possible to obtain novel 2-alkyl-3-aryloxaziridines.
    Type: Application
    Filed: April 23, 2004
    Publication date: October 7, 2004
    Inventors: Alexander Klausener, Reinhard Langer, Stephan Ratsch, Michael Dockner
  • Patent number: 6740761
    Abstract: 2-Alkyl-3-aryl- or -heteroaryloxaziridines are prepared in a particularly advantageous manner by oxidizing corresponding N-alkyl-aryl- or -heteroarylaldimines with an aromatic percarboxylic acid or a salt thereof in the presence of water, a water-soluble base, and a water-miscible solvent, at temperatures below 30° C. Using this method, it is also possible to obtain novel 2-alkyl-3-aryloxaziridines.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: May 25, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alexander Klausener, Reinhard Langer, Stephan Ratsch, Michael Dockner
  • Publication number: 20020111339
    Abstract: 2-Alkyl-3-aryl- or -heteroaryloxaziridines are prepared in a particularly advantageous manner by oxidizing corresponding N-alkyl-aryl- or -heteroarylaldimines with an aromatic percarboxylic acid or a salt thereof in the presence of water, a water-soluble base, and a water-miscible solvent, at temperatures below 30° C. Using this method, it is also possible to obtain novel 2-alkyl-3-aryloxaziridines.
    Type: Application
    Filed: July 5, 2001
    Publication date: August 15, 2002
    Inventors: Alexander Klausener, Reinhard Langer, Stephan Ratsch, Michael Dockner