Patents by Inventor Hans-Joachim Ressel

Hans-Joachim Ressel 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).

  • Substituted sulfonylaminomethylbenzoic acid (derivatives) and their preparation
    Patent number: 7189848
    Abstract: The present invention relates to a compound of the formula (I) The compound according to the invention is suitable for the preparation of herbicidal active substances such as sulfonylureas.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: March 13, 2007
    Assignee: Bayer CropScience GmbH
    Inventors: Klaus Lorenz, Hans-Joachim Ressel, Lothar Willms
  • Substituted sulfonylaminomethylbenzoic acid ( derivatives) and their preparation
    Publication number: 20050148473
    Abstract: The present invention relates to a compound of the formula (I) The compound according to the invention is suitable for the preparation of herbicidal active substances such as sulfonylureas.
    Type: Application
    Filed: March 7, 2005
    Publication date: July 7, 2005
    Inventors: Klaus Lorenz, Hans-Joachim Ressel, Lothar Willms
  • Substituted sulfonylaminomethylbenzoic acid (derivatives) and their preparation
    Patent number: 6884903
    Abstract: The present invention relates to a compound of the formula (I) The compound according to the invention is suitable for the preparation of herbicidal active substances such as sulfonylureas.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: April 26, 2005
    Assignee: Aventis CropScience GmbH
    Inventors: Klaus Lorenz, Hans-Joachim Ressel, Lothar Willms
  • Substituted sulfonylaminomethylbenzoic acid (derivatives) and their preparation
    Publication number: 20030208087
    Abstract: The present invention relates to a compound of the formula (I) 1
    Type: Application
    Filed: March 13, 2003
    Publication date: November 6, 2003
    Inventors: Klaus Lorenz, Hans-Joachim Ressel, Lothar Willms
  • Substituted sulfonylaminomethylbenzoic acid (derivatives) and their preparation
    Patent number: 6538150
    Abstract: The present invention relates to a compound of the formula (I) The compound according to the invention is suitable for the preparation of herbicidal active substances such as sulfonylureas.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: March 25, 2003
    Assignee: Aventis CropScience GmbH
    Inventors: Klaus Lorenz, Hans-Joachim Ressel, Lothar Willms
  • Substituted sulfonylaminomethylbenzoic acid (derivatives) and their preparation
    Publication number: 20020062029
    Abstract: The present invention relates to a compound of the formula (I) 1
    Type: Application
    Filed: July 20, 2001
    Publication date: May 23, 2002
    Inventors: Klaus Lorenz, Hans-Joachim Ressel, Lothar Willms
  • Method for producing chlorobenzoxazolene
    Patent number: 6274739
    Abstract: The invention relates to a process for preparing chlorobenzoxazoles of the formula (I), in which R1, R2 and R4 are as defined in claim 1 and in case (a) R3=H, halogen, CN, NO2, C1-C5-alkyl, C1-C5-alkoxy, aryl or aryloxy, where each of the 4 lastmentioned radicals is unsubstituted or substituted, or in case (b) R3=chlorine, which comprises reacting benzoxazoles of the formula (II), in which R1, R2 and R4 are as defined in formula (I) and R3 in case (a) is as defined in formula (I) and R3 in case (b) is hydrogen, in the presence of an acidic catalyst with a chlorinating agent to give the monochlorination product (I) or in case (b) with an excess of the chlorinating agent to give the dichlorination product (I) in which R3=chlorine.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: August 14, 2001
    Assignee: Aventis CropScience GmbH
    Inventors: Hans-Joachim Ressel, Mohammed Aslam, Jean Pierre Demoute, Günter Schlegel, Wolfgang Welter
  • Process for the preparation of pyrimidines
    Patent number: 4960887
    Abstract: The invention relates to a process for the preparation of compounds of the formula I ##STR1## in which X and Y denote O or S; R.sup.1 and R.sup.2 denote (substituted) alkyl, R.sup.3 denotes H or a --COR.sup.4 radical in which R.sup.4 is alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, (substituted) phenyl or (substituted) phenoxy, wherein a propanediimidate of the formula II ##STR2## or a salt thereof is reacted, in an inert solvent and in the presence of a base, with a carbonic acid imine derivative of the formula III ##STR3## in which R.sup.5 denotes halogen, alkoxy, alkylthio, phenoxy or phenylthio.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: October 2, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Stephen Lachhein, Hans-Joachim Ressel
  • Process for the preparation of 5-phenylsulfinyl-1H-2-(methoxycarbonylamino)-benzimidazole
    Patent number: 4792610
    Abstract: A highly selective, inexpensive and quantitative process is described for the preparation of 5-phenylsulfinyl-1H-2-(methoxycarbonylamino)-benzimidazole (oxfendazole) through reaction of 5-phenylmercapto-1H-2-(methoxycarbonylamino)-benzimidazole with hydrogen peroxide in the presence of one or more aliphatic C.sub.1 -C.sub.6 -alcohols with addition of a strong, nonoxidizing mineral acid.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: December 20, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Stephen Lachhein, Hilmar Mildenberger, Hans-Joachim Ressel