Patents by Inventor Andreas Krebs

Andreas Krebs 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).

  • Enantiomerically pure 2-oxa-5,8-dizaabicyclo[4.3.0] nonanes and process for their preparation
    Patent number: 6004956
    Abstract: The invention relates to enantiomerically pure 2-oxa-5,8-diazabicyclo[4.3.0]nonanes and processes for their preparation.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: December 21, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Schenke, Andreas Krebs, Uwe Petersen
  • Process for preparing 3-chlorobenzisothiazoles
    Patent number: 5883258
    Abstract: N-Unsubstituted 3-chlorobenzisothiazoles are obtained by reacting N-unsubstituted benzisothiazolones with phosgene in the presence of catalysts.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: March 16, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut Kraus, Andreas Krebs, Robert Sollner
  • 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives
    Patent number: 5780394
    Abstract: There are provided new 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives of the formula (I) ##STR1## in which A and B are identical or different and independently of one another in each case represent hydrogen, alkyl, alkenyl, alkynyl, alkoxyalkyl, alkylthioalkyl, cycloalkyl or optionally substituted aryl orA and B together represent the bivalent radical of a saturated or unsaturated, optionally substituted, mono-, bi-, tri- or polycyclic system,X represents alkyl, halogen or alkoxy,Y represents hydrogen, alkyl, halogen, alkoxy or halogenoalkyl,Z represents alkyl, halogen or alkoxyn represents a number 0, 1, 2 or 3,G represents hydrogen (a) or the groups ##STR2## in which E represents a metal ion equivalent or an ammonium ion,L and M represents oxygen and/or sulphur,and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 have the meaning given in the text of the application.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: July 14, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd-Wieland Kruger, Reiner Fischer, Heinz-Jurgen Bertram, Thomas Bretschneider, Stefan Bohm, Andreas Krebs, Thomas Schenke, Hans-Joachim Santel, Klaus Lurssen, Robert R. Schmidt, Christoph Erdelen, Ulrike Wachendorff-Neumann, Wilhelm Stendel
  • Aryl carboxylic acid derivatives
    Patent number: 5739389
    Abstract: There are provided an aryl carboxylic acid derivatives of the formula (XVIa) ##STR1## Aryl carboxylic acid derivatives of the formula (XVIa) have a particularly pronounced activity against animal pests, in particular against insects and arachnids, and against weeds.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: April 14, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd-Wieland Kruger, Reiner Fischer, Heinz-Jurgen Bertram, Thomas Bretschneider, Stefan Bohm, Andreas Krebs, Thomas Schenke, Hans-Joachim Santel, Klaus Lurssen, Robert R. Schmidt, Christoph Erdelen, Ulrike Wachendorff-Neumann, Wilhelm Stendel
  • 7-isoindolinyl-quinolone derivatives and 7-isoindolinyl-naphthyridone derivatives
    Patent number: 5739339
    Abstract: The invention relates to novel quinolone derivatives and naphthyridone derivatives which are substituted in the 7-position by a partially hydrogenated isoindolinyl ring, to processes for their preparation and to antibacterial agents and feed additives containing them.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: April 14, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Philipps, Stephan Bartel, Andreas Krebs, Uwe Petersen, Thomas Schenke, Klaus-Dieter Bremm, Rainer Endermann, Karl Georg Metzger, Burkhard Mielke
  • Preparation of 7-(3-amino- and 3-amino-methyl-1-pyrrolidinyl)-3-quinolonecarboxylic acids and -naphthridonecarboxylic acids
    Patent number: 5723627
    Abstract: Process for the preparation of antibacterial compounds of the formula ##STR1## comprises condensing an oxo compound of the formula ##STR2## with an amino compound of the formula ##STR3## to produce a compound of the formula ##STR4## reacting the compound of the formula (III) with a compound of the formula ##STR5## to give a compound of the formula ##STR6## and then eliminating the amino-protective group ##STR7##
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: March 3, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Andreas Krebs, Thomas Schenke, Klaus Grohe, Michael Schriewer, Ingo Haller, Karl Georg Metzger, Rainer Endermann, Hans-Joachim Zeiler
  • 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives
    Patent number: 5661110
    Abstract: There are provided new 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives of the formula (I) ##STR1## The new 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives of the formula (I) have a particularly pronounced activity against animal pests, in particular against insects and arachnids, and against weeds.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 26, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd-Wieland Kruger, Reiner Fischer, Heinz-Jurgen Bertram, Thomas Bretschneider, Stefan Bohm, Andreas Krebs, Thomas Schenke, Hans-Joachim Santel, Klaus Lurssen, Robert R. Schmidt, Christoph Erdelen, Ulrike Wachendorff-Neumann, Wilhelm Stendel
  • Preparation of 7-(3-amino- and 3-amino-methyl-1-pyrrolidinyl)-3-quinolonecarboxylic acids and -naphthyridonecarboxylic acids
    Patent number: 5648493
    Abstract: Process for the preparation of antibacterial compounds of the formula ##STR1## comprises condensing an oxo compound of the formula ##STR2## with an amino compound of the formula ##STR3## to produce a compound of the formula ##STR4## reacting the compound of the formula (III) with a compound of the formula ##STR5## to give a compound of the formula ##STR6## and then eliminating the amino-protective group ##STR7##
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: July 15, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Andreas Krebs, Thomas Schenke, Klaus Grohe, Michael Schriewer, Ingo Haller, Karl Georg Metzger, Rainer Endermann, Hans-Joachim Zeiler
  • 7-(1-pyrrolidinyl)-3-quinolone- and - naphthyridone-carboxylic acid derivatives as antibacterial agents and feed additives
    Patent number: 5607942
    Abstract: 7-(1-Pyrrolidinyl)-3-quinolone- and -naphthyridone-carboxylic acid derivatives as antibacterial agents and feed additives, of the formula ##STR1## in which X.sup.1 is halogen,X.sup.2 is hydrogen, halogen, amino or other radical,R.sup.1 is alkyl, cycloalkyl, optionally substituted phenyl or other radical,R.sup.2 is hydrogen, alkyl or a dioxolylmethyl radical,R.sup.3 is ##STR2## and A is N, CH, C-halogen, or the like, or forms a bridge with R.sup.1,and addition products thereof.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: March 4, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Thomas Schenke, Andreas Krebs, Klaus Grohe, Michael Schriewer, Ingo Haller, Karl G. Metzger, Rainer Endermann, Hans-Joachim Zeiler
  • 7-isoindolinyl-naphthyridone derivatives, compositions and anti-bacterial use thereof
    Patent number: 5556979
    Abstract: The invention relates to novel quinolone derivatives and naphthyridone derivatives which are substituted in the 7-position by a partially hydrogenated isoindolinyl ring, to processes for their preparation and to antibacterial agents and feed additives containing them.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: September 17, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Philipps, Stephan Bartel, Andreas Krebs, Uwe Petersen, Thomas Schenke, Klaus-Dieter Bremm, Rainer Endermann, Karl G. Metzger, Burkhard Mielke
  • Enantiomerically pure 2-oxa-5,8-diazabicyclo[4.3.0]nonanes and process for their preparation
    Patent number: 5532364
    Abstract: This invention relates to a process for preparing an enantiomerically pure compound of the formula ##STR1## wherein R.sup.1 and R.sup.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: July 2, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Schenke, Andreas Krebs, Uwe Petersen
  • Quinolonecarboxylic acids
    Patent number: 5480879
    Abstract: The invention relates to novel derivatives of quinolonecarboxylic acid and naphthyridonecarboxylic acid which are linked to a .beta.-lactam antibiotic, to their salts, to processes for their preparation and to antibacterial agents containing these derivatives.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: January 2, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Wilfried Schrock, Dieter Habich, Andreas Krebs, Thomas Schenke, Thomas Philipps, Klaus Grohe, Rainer Endermann, Klaus-Dieter Bremm, Karl-Georg Metzger
  • 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives
    Patent number: 5474974
    Abstract: There are provided new 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives of the formula (I) ##STR1## The new 3-hydroxy-4-aryl-5-oxo-pyrazoline derivatives of the formula (I) have a particularly pronounced activity against animal pests, in particular against insects and arachnids, and against weeds.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: December 12, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd-Wieland Kruger, Reiner Fischer, Heinz-Jurgen Bertram, Thomas Bretschneider, Stefan Bohm, Andreas Krebs, Thomas Schenke, Hans-Joachim Santel, Klaus Lurssen, Robert R. Schmidt, Christoph Erdelen, Ulrike Wachendorff-Neumann, Wilhelm Stendel
  • 8-vinyl- and 9-ethinyl-quinolone-carboxylic acids
    Patent number: 5468742
    Abstract: The invention relates to new 8-vinyl- and 8-ethinylquinolonecarboxylic acids, process for their preparation, and antibacterial agents and feed additives containing them.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: November 21, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Thomas Himmler, Thomas Schenke, Andreas Krebs, Klaus Grohe, Klaus-Dieter Bremm, Karl G. Metzger, Rainer Endermann, Hans-Joachim Zeiler
  • 7-isoindolinyl-quinolone-carboxylic acid derivatives
    Patent number: 5464796
    Abstract: The invention relates to new quinolone- and naphthyridonecarboxylic acid derivatives which are substituted in the 7-position by a partly hydrogenated isoindolinyl ring, processes for their preparation and antibacterial agents and feed additives containing these compounds.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: November 7, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Andreas Krebs, Thomas Schenke, Franz Kunisch, Thomas Philipps, Klaus Grohe, Klaus-Dieter Bremm, Rainer Endermann, Karl-Georg Metzger, Ingo Haller, Hans-Joachim Zeiler
  • Quinolone- and naphthyridonecarboxylic acid derivatives
    Patent number: 5457104
    Abstract: The invention relates to new quinolone- and naphthyridonecarboxylic acid derivatives which have hydrogen in the 6-position, to processes for their preparation, and to antibacterial compositions and feed additives containing them.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: October 10, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stephan Bartel, Andreas Krebs, Franz Kunisch, Uwe Petersen, Thomas Schenke, Klaus Grohe, Michael Schriewer, Klaus-Dieter Bremm, Rainer Endermann, Karl-Georg Metzger
  • Enantiomerically pure 2-oxa-5,8-diazabicyclo[4.3.0]nonanes and process for their preparation
    Patent number: 5436334
    Abstract: The invention relates to enantiomerically pure 2-oxa-5,8-diazabicyclo[4.3.0]nonanes and processes for their preparation.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: July 25, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Schenke, Andreas Krebs, Uwe Petersen
  • 7-(1-pyrrolidinyl)-3-quinolone carboxylic acid derivatives as antibacterial agents and feed additives
    Patent number: 5416096
    Abstract: 7-(1-Pyrrolidinyl)-3-quinolone- and -naphthyridonecarboxylic acid derivatives as antibacterial agents and feed additives, of the formula ##STR1## in which X.sup.1 is halogen,X.sup.2 is hydrogen, halogen, amino or other radical,R.sup.1 is alkyl, cycloalkyl, optionally substituted phenyl or other radical,R.sup.2 is hydrogen, alkyl or a dioxolylmethyl radical,R.sup.3 is ##STR2## and A is N, CH, C-halogen, or the like, or forms a bridge with R.sup.1,and addition products thereof.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: May 16, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Thomas Schenke, Andreas Krebs, Klaus Grohe, Michael Schriewer, Ingo Haller, Karl G. Metzger, Rainer Endermann, Hans-Joachim Zeiler
  • 3-aryl-pyrone derivatives
    Patent number: 5393729
    Abstract: The invention relates to 3-aryl-pyrone derivatives of the general formula (I) ##STR1## in which the substituents are as defined in the specification. The compounds are useful as pesticides, herbicides and fungicides.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: February 28, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reiner Fischer, Andreas Krebs, Folker Lieb, Michael Ruther, Jorg Stetter, Christoph Erdelen, Ulrike Wachendorff-Neumann, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt
  • Naphthyridonecarboxylic acid derivatives
    Patent number: 5371090
    Abstract: The invention relates to naphthyridonecarboxylic acid derivatives which are substituted in the 7-position by an optionally partially hydrogenated azaisoindolinyl ring, to processes for their preparation, and to antibacterial agents and feed additives containing them.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: December 6, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Petersen, Andreas Krebs, Thomas Schenke, Klaus Grohe, Klaus-Dieter Bremm, Rainer Endermann, Karl-Georg Metzger, Hans-Joachim Zeiler