Patents by Inventor Dirk Grotjohann

Dirk Grotjohann 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 process
    Patent number: 7351823
    Abstract: The present invention relates to a process for preparing 5-chloro-N-({(5S)-2-oxo-3-[4-(3-oxo-4-morpholinyl)phenyl]-1,3-oxazolidin-5-yl}methyl)-2-thiophenecarboxamide starting from 2-[(2S)-2-oxiranylmethyl]-1H-isoindole-1,3(2H)-dione, 4-(4-aminophenyl)-3-morpholinone and 5-chlorothiophene-2-carbonyl chloride.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: April 1, 2008
    Assignee: Bayer HealthCare AG
    Inventors: Mathias Berwe, Christian Thomas, Joachim Rehse, Dirk Grotjohann
  • Preparation process
    Publication number: 20050182055
    Abstract: The present invention relates to a process for preparing 5-chloro-N-({(5S)-2-oxo-3-[4-(3-oxo-4-morpholinyl)phenyl]-1,3-oxazolidin-5-yl}methyl)-2-thiophenecarboxamide starting from 2-[(2S)-2-oxiranylmethyl]-1H-isoindole-1,3(2H)-dione, 4-(4-aminophenyl)-3-morpholinone and 5-chlorothiophene-2-carbonyl chloride.
    Type: Application
    Filed: January 10, 2005
    Publication date: August 18, 2005
    Applicant: Bayer HealthCare AG
    Inventors: Mathias Berwe, Christian Thomas, Joachim Rehse, Dirk Grotjohann
  • Method for production of diaminodiphenylmethanes
    Patent number: 6649798
    Abstract: The present invention concerns a process for the production of methylenedianiline (MDA) having a high monomer content.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: November 18, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stephan Klein, Dirk Grotjohann, Christine Mendoza-Frohn, Daniel Koch, Heinz-Herbert Müller, Hans-Georg Pirkl, Rudolf Uchdorf, Gerhard Wegener
  • Method for production of diaminodiphenylmethanes
    Publication number: 20030023116
    Abstract: The present invention concerns a process for the production of methylenedianiline (MDA) having a high monomer content.
    Type: Application
    Filed: August 7, 2002
    Publication date: January 30, 2003
    Inventors: Stephan Klein, Dirk Grotjohann, Christine Mendoza-Frohn, Daniel Koch, Heinz-Herbert Mller, Hans-Georg Pirkl, Rudolf Uchdorf