Patents by Inventor Alexander Klausener

Alexander Klausener 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: 7897780
    Abstract: Novel silylated carboxamides of the formula (I) in which M, L, R1, R2, R3, R and A are as defined in the description, a plurality of processes for preparing these compounds and their use for controlling unwanted microorganisms, and also novel intermediates and their preparation.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: March 1, 2011
    Assignee: Bayer CropScience AG
    Inventors: Ralf Dunkel, Hans-Ludwig Elbe, Benoit Hartmann, Jörg Nico Greul, Alexander Klausener, Stefan Herrmann, Ronald Ebbert, Peter Dahmen, Karl-Heinz Kuck, Ulrike Wachendorff-Neumann
  • Patent number: 7671217
    Abstract: The invention relates to a method for the thermal decarboxylation of dicarboxylic acids, in particular to 3,4-ethylene dioxythiophene-2,5-dicarboxylic acid as an educt. According to said method the educt is used in solid form and/or the reaction is carried out in the presence of a plurality of fluidised bed bodies. No solvents are used in the reaction and the decarboxylation product that is formed during the reaction is carried away from the reaction zone in gaseous form.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: March 2, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Sigurd Buchholz, Alexander Klausener, Reinhard Langer, Leslaw Mleczko, Günter Rauchschwalbe
  • Patent number: 7598389
    Abstract: Novel silylated carboxamides of the formula (I) in which R, L, R1, R3, R3, R4 and A are as defined in the description, a plurality of processes for preparing these compounds and their use for controlling unwanted microorganisms.
    Type: Grant
    Filed: November 6, 2004
    Date of Patent: October 6, 2009
    Assignee: Bayer Cropscience AG
    Inventors: Ralf Dunkel, Hans-Ludwig Elbe, Benoit Hartmann, Alexander Klausener, Jörg Nico Greul, Ulrike Wachendorff-Neumann, Peter Dahmen, Karl-Heinz Kuck
  • Publication number: 20070293455
    Abstract: Novel silylated carboxamides of the formula (I) in which M, L, R1, R2, R3, R and A are as defined in the description, a plurality of processes for preparing these compounds and their use for controlling unwanted microorganisms, and also novel intermediates and their preparation.
    Type: Application
    Filed: March 4, 2005
    Publication date: December 20, 2007
    Applicant: BAYER CROPSCIENCE AG
    Inventors: Ralf Dunkel, Hans-Ludwig Elbe, Benoit Hartmann, Jorg Greul, Alexander Klausener, Stefan Herrmann, Ronald Ebbert, Peter Dahmen, Karl-Heinz Kuck, Ulrike Wachendorff-Neumann
  • Publication number: 20070191454
    Abstract: Novel silylated carboxamides of the formula (I) in which R, L, R1, R2, R3, R4 and A are as defined in the description, a plurality of processes for preparing these compounds and their use for controlling unwanted microorganisms.
    Type: Application
    Filed: November 6, 2004
    Publication date: August 16, 2007
    Applicant: Bayer Cropscience Aktiengesellschaft
    Inventors: Ralf Dunkel, Hans-Ludwig Elbe, Benoit Hartmann, Alexander Klausener, Jorg Greul, Ulrike Wachendorff-Neumann, Peter Dahmen, Karl-Heinz Kuck
  • 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: 20060149083
    Abstract: The invention relates to a method for the thermal decarboxylation of dicarboxylic acids, in particular to 3,4-ethylene dioxythiophene-2,5-dicarboxylic acid as an educt. According to said method the educt is used in solid form and/or the reaction is carried out in the presence of a plurality of fluidised bed bodies. No solvents are used in the reaction and the decarboxylation product that is formed during the reaction is carried away from the reaction zone in gaseous form.
    Type: Application
    Filed: December 4, 2003
    Publication date: July 6, 2006
    Inventors: Sigurd Buchholz, Alexander Klausener, Reinhard Langer, Leslaw Mleczko, Gunter Leverkusen
  • Patent number: 6933406
    Abstract: The present invention relates to a process for the preparation of 2-halo-6-nitrobenzoic acids by oxidation of 2-halo-6-nitro-benzyl alcohols, esters, ethers, or mixtures thereof with nitric acid and to the use of this process as a step in the preparation of 2-halo-6-nitrobenzoic acids from 2-halo-6-nitrotoluenes.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: August 23, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Langer, Alexander Klausener
  • Patent number: 6825357
    Abstract: The invention relates to substituted or unsubstituted benzodioxinothiophenes, their preparation and their use for preparing electrically conductive oligomers or polymers, also oligomers or polymers comprising these thiophene derivatives as repeating unit.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: November 30, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Günter Rauchschwalbe, Alexander Klausener, Stephan Kirchmeyer, Knud Reuter
  • Patent number: 6822095
    Abstract: The present invention relates to a process for preparing 4,6-dichloropyrimidine by reaction of 4-chloro-6-hydroxypyrimidine with an acid chloride.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: November 23, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz-Josef Mais, Günther Cramm, Alexander Klausener, Guido Steffan
  • 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: 6774239
    Abstract: This invention relates to the preparation of N,N′-carbonyldiazoles in a particularly advantageous manner by reacting corresponding azolide salts with phosgene in an aromatic compound or an ether as solvent. The azolide salts are preferably prepared by a novel process from an azole that is reacted with a compound of the formula M′R7 or MgR8Z′ in the presence of a solvent.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: August 10, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Johannes Scherer, Alexander Klausener, Robert Söllner
  • Patent number: 6750354
    Abstract: The invention relates to a process for the alkylation of 3,4-dihydroxythiophene-2,5-dicarboxylic esters or their alkali metal or alkaline earth metal salts with alkylating agents in a polar diluent in the presence of quaternary onium salts.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: June 15, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Günter Rauchschwalbe, Alexander Klausener, Josef Bremen, Ralf-Ingo Schenkel, Adolf Winkler
  • 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
  • Patent number: 6710217
    Abstract: The invention relates to a process for preparing 4-chlorobiphenyl by (a) reacting biphenyl and chlorine in the presence of one or more ring-chlorination catalysts, and (b) subjecting the reaction mixture obtained in step (a) to fractional distillation to obtain 4-chlorobiphenyl.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: March 23, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Langer, Alexander Klausener, Paul Wagner, Lothar Puppe
  • Publication number: 20040030183
    Abstract: The present invention relates to an improved process for preparing methyl N-butyryl-4-amino-3-methylbenzoate and the novel chemical compound N-(4-bromo-2-methylphenyl)butanamide.
    Type: Application
    Filed: August 4, 2003
    Publication date: February 12, 2004
    Inventors: Lars Rodefeld, Thomas Hopfner, Alexander Klausener, Horst Behre
  • Patent number: 6620962
    Abstract: According to the invention, N-butyryl-4-amino-3-methyl-methyl benzoate is obtained in a particularly advantageous manner by, initially, reacting o-toluidine with butyric acid chloride, by brominating the reaction product and by reacting the bromide obtained therefrom with carbon monoxide and methanol in the presence of a palladium catalyst. The invention also relates to the important novel chemical compound N-(4-bromine-2-methylphenyl)-butanamide.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: September 16, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lars Rodefeld, Thomas Höpfner, Alexander Klausener, Horst Behre
  • Patent number: 6610893
    Abstract: A process is provided for preparing 4-hydroxy-3-nitrobiphenyl from 4-hydroxy-biphenyl by nitrating in the position adjacent to the phenolic hydroxyl group in high selectivity and yield, and the nitric acid used as the nitrating reagent is metered into the reaction system in a specific manner.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: August 26, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Behre, Michael Dockner, Alexander Klausener
  • Publication number: 20030097007
    Abstract: The invention relates to a process for the alkylation of 3,4-dihydroxythiophene-2, 5-dicarboxylic esters or their alkali metal or alkaline earth metal salts with alkylating agents in a polar diluent in the presence of quaternary onium salts.
    Type: Application
    Filed: September 27, 2002
    Publication date: May 22, 2003
    Inventors: Gunter Rauchschwalbe, Alexander Klausener, Josef Bremen, Ralf-Ingo Schenkel, Adolf Winkler
  • Patent number: 6562970
    Abstract: The present invention relates to a process for preparing 4-chloro-6-hydroxypyrimidine from 4-chloro-6-methoxypyrimidine.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 13, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz-Josef Mais, Günther Cramm, Alexander Klausener, Guido Steffan