Patents by Inventor Matthias Schaeffer

Matthias Schaeffer 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).

  • N-arylsulfonamide and pyrrolidinecarboxylic acid intermediates, and their use for the preparation of herbicidal 1,3-dioxo-1h-pyrrolo[1,2-c]imidazole derivatives
    Patent number: 6664400
    Abstract: The present invention relates to a compound of Formula 3 wherein X is H, F or Cl; Y is F or Cl; R1 is C1-C3 haloalkyl, C2-C4 alkoxyalkyl; C2-C6 haloalkoxyalkyl or C2-C6 cyanoalkyl; R2 is H, C1-C4 alkyl, C1-C4 haloalkyl, C3-C4 alkenyl, C3-C4 alkynyl, C2-C4 alkoxyalkyl, C2-C4 alkylcarbonyl or C2-C4 alkoxycarbonyl; R3 is H or OH; and R4 is H, F or Cl; provided that when R3 is H then R4 is F or Cl and when R3 is OH then R4 is H.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: December 16, 2003
    Assignee: Degussa AG
    Inventors: Eric Deguyon Taylor, Viacheslav Alexandrovich Petrov, Matthias Schaeffer, Karlheinz Drauz, Anne Vogt, Christoph Weckbecker, Steven H. Swearingen, Balreddy Kamireddy
  • N-arylsulfonamide and pyrrolidinecarboxylic acid intermediates, and their use for the preparation of herbicidal 1,3-dioxo-1h-pyrrolo[1,2-c]imidazole derivatives
    Publication number: 20020137946
    Abstract: This invention is directed to compounds and intermediates of Formulae (6 and 3), useful in preparing herbicidal sulfonamides of Formula (1), including all geometric and stereoisomers thereof, and agricultural salts thereof, wherein X is H, F or Cl; Y is F or Cl; R1 is C1-C3 haloalkyl, C2-C4 alkoxyalkyl; C2-C6 haloalkoxyalkyl or C2-C6 cyanoalkyl; R2 is H, C1-C4 alkyl, C1-C4 haloalkyl; C3-C4 alkenyl, C3-C4 alkynyl, C2-C4 alkoxyalkyl, C2-C4 alkylcarbonyl or C2-C4 alkoxycarbonyl; R3 is H or OH; R4 is H, F or Cl; and R5 is F or Cl; provided that when R3 is H then R4 is F or Cl and when R3 is OH then R4 is H.
    Type: Application
    Filed: January 4, 2002
    Publication date: September 26, 2002
    Applicant: DEGUSSA AG
    Inventors: Eric Deguyon Taylor, Viacheslav Alexandrovich Petrov, Matthias Schaeffer, Karlheinz Drauz, Anne Vogt, Christoph Weckbecker, Steven H. Swearingen, Balreddy Kamireddy
  • N-arylsulfonamide- and pyrrolidinecarboxylic acid intermediates, and their use for the preparation of herbicidal 1,3-dioxo-1h-pyrrolo[1,2-c]imidazole derivatives
    Patent number: 6384234
    Abstract: This invention is directed to compounds and intermediates of Formulae 6 and 3, useful in preparing herbicidal sulfonamides of Formula 1, including all geometric and stereoisomers thereof, and agricultural salts thereof. wherein the substituents are defined in the specification.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: May 7, 2002
    Assignee: Degussa AG
    Inventors: Eric Deguyon Taylor, Viacheslav Alexandrovich Petrov, Matthias Schaeffer, Karlheinz Drauz, Anne Vogt, Christoph Weckbecker, Steven Swearingen, Balreddy Kamireddy