Patents by Inventor Jan-Bernd Lenfers

Jan-Bernd Lenfers 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).

  • Phenoxyphenyl alkanesulphonates
    Publication number: 20040214886
    Abstract: The invention relates to novel phenoxyphenyl alkanesulphonates, processes for their preparation, their use for producing medicaments for the treatment and/or prophylaxis of diseases, in particular for the treatment of states of pain and neurodegenerative disorders
    Type: Application
    Filed: May 20, 2004
    Publication date: October 28, 2004
    Applicant: Bayer Aktiengesellschaft
    Inventors: Markus Heil, Heinrich Meier, Paul Naab, Arnd Voerste, Jean-Marie-Viktor De Vry, Dirk Denzer, Frank Mauler, Klemens Lustig, Jan-Bernd Lenfers
  • Process for the preparation of enantiomerically pure cycloalkano-indol -and azaindol -and pyrimido [1,2A]indolcarbocyclic acids and their activated derivatives
    Patent number: 6774236
    Abstract: The invention relates to a process and intermediates for the preparation of enantiomerically pure cycloalkanoindolecarboxylic acids and azaindolecarboxylic acids and pyrimido[1,2a]indolecarboxylic acids and their activated derivatives, characterized in that the tolyl acetic acid is first esterified with a chiral alcohol, then diastereoselective substitution at &agr;-carbon atoms is carried out and this product is halogenated in the tolyl group and then reacted with appropriate cycloalkanoindoles, cycloalkanoazaindoles or pyrimido[1,2a]indoles. It is possible by this method to prepare specifically, in high purity, the enantiomerically pure carboxylic acids which are intermediates for valuable medicaments.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: August 10, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan-Bernd Lenfers, Peter Fey, Paul Naab, Kai Van Laak
  • Phenoxyphenyl alkanesulphonates
    Patent number: 6756409
    Abstract: The invention relates to novel phenoxyphenyl alkanesulphonates, processes for their preparation, their use for producing medicaments for the treatment and/or prophylaxis of diseases, in particular for the treatment of states of pain and neurodegenerative disorders.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: June 29, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Heil, Heinrich Meier, Paul Naab, Arnd Voerste, Jean-Marie-Viktor De Vry, Dirk Denzer, Frank Mauler, Klemens Lustig, Jan-Bernd Lenfers
  • Phenoxyphenyl alkanesulphonates
    Publication number: 20030022934
    Abstract: The invention relates to novel phenoxyphenyl alkanesulphonates, processes for their preparation, their use for producing medicaments for the treatment and/or prophylaxis of diseases, in particular for the treatment of states of pain and neurodegenerative disorders
    Type: Application
    Filed: September 26, 2001
    Publication date: January 30, 2003
    Inventors: Markus Heil, Heinrich Meier, Paul Naab, Arnd Voerste, Jean-Marie-Viktor De Vry, Dirk Denzer, Frank Mauler, Klemens Lustig, Jan-Bernd Lenfers
  • Process for the preparation of enantiomerically pure cycloalkano-indol -and azaindol -and pyrimido ?1,2a! indolcarboxcyclic acids and their activated derivatives
    Patent number: 5952498
    Abstract: The invention relates to a process and intermediates for the preparation of enantiomerically pure cycloalkanoindolecarboxylic acids and azaindolecarboxylic acids and pyrimido?1,2a!indolecarboxylic acids and their activated derivatives, characterized in that the tolyl acetic acid is first esterified with a chiral alcohol, then diastereoselective substitution at .alpha.-carbon atoms is carried out and this product is halogenated in the tolyl group and then reacted with appropriate cycloalkanoindoles, cycloalkanoazaindoles or pyrimido?1,2a!indoles. It is possible by this method to prepare specifically, in high purity, the enantiomerically pure carboxylic acids which are intermediates for valuable medicaments.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: September 14, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan-Bernd Lenfers, Peter Fey, Paul Naab, Kai Van Laak
  • 3-substituted quinoline-5-carboxylic acid derivatives and processes for their preparation
    Patent number: 5650514
    Abstract: The present invention relates to 3-substituted quinoline-5-carboxylic acid derivatives and processes for their preparation.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: July 22, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Stoltefuss, Michael Negele, Karl-Heinz Wahl, Jan-Bernd Lenfers, Samir Samaan
  • Substituted dibenz-oxa-thiocinones, -12-oxides and -12,12-dioxides, a process for their preparation and their use in medicaments
    Patent number: 5190971
    Abstract: The invention relates to substituted dibenz-oxa-thiocinone-12-oxides and -12,12-dioxides of the general formula I ##STR1## in which R.sup.1 to R.sup.6 and Y have the meaning indicated in the description, to processes for their preparation and to their use in medicaments, in particular in circulation-influencing medicaments.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: March 2, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Fey, Klaus Frobel, Jan-Bernd Lenfers, Andreas Knorr, Johannes-Peter Stasch, Erwin Bischoff, Hans-Georg Dellweg, Martin Beuck
  • Circulation-active dibenzo[1,5]dioxocin-5-ones
    Patent number: 5089487
    Abstract: Cardioactive compounds of the formula ##STR1## in which R.sup.1 and R.sup.8 and R.sup.14 and R.sup.15 can be hydrogen or various organic radicals.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: February 18, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Frobel, Jan-Bernd Lenfers, Peter Fey, Andreas Knorr, Johannes-Peter Stasch, Hartwig Muller, Erwin Bischoff, Hans-Georg Dellweg