Patents by Inventor Karen Peilstöcker

Karen Peilstöcker 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).

  • Preparation of halogenated 4-aminophenols
    Patent number: 7358397
    Abstract: The present invention relates to halogenated 4-aminophenols and to halogenated 4-(phenyidiazenyl)phenols, to a process for their preparation and to the use of the halogenated 4-hydroxyphenols for preparing active ingredients, especially in pharmaceuticals and agrochemicals.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: April 15, 2008
    Assignee: LANXESS Deutschland GmbH
    Inventors: Karen Peilstöcker, Albrecht Marhold, Jens-Peter Joschek
  • Fluorinated benzaldehydes
    Patent number: 6903239
    Abstract: The present invention relates to fluorinated benzaldehydes, to a process for preparing them and also to the use of the fluorinated benzaldehydes for preparing active ingredients, especially in medicaments and agrochemicals.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: June 7, 2005
    Assignee: Bayer Chemical Aktiengesellschaft
    Inventors: Karen Peilstöcker, Albrecht Marhold
  • Process for the preparation of trifluoromethyl-substituted biphenylcarboxylic acids and novel trichloromethyl-and trifluoromethyl-substituted biphenylcarbonitriles
    Patent number: 6580002
    Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: June 17, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Müller, Albrecht Marhold, Karen Peilstöcker
  • Process for the preparation of trifluoromethyl-substituted biphenylcarboxylic acids and novel trichloromethyl-and trifluoromethyl-substituted biphenylcarbonitriles
    Patent number: 6465688
    Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: October 15, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Müller, Albrecht Marhold, Karen Peilstöcker