Patents by Inventor Doris Neumann-Grimm

Doris Neumann-Grimm 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: 6001831
    Abstract: A process for producing 1,2,3,4-tetrahydro-2,4-dioxo-quinazoline-1-yl acetic acid derivatives of the formula (I) in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are mutually independently hydrogen, halogen, OH, NO.sub.2, (C.sub.1 -C.sub.6) alkoxy, (C.sub.1 -C.sub.6) alkyl, halogen-substituted (C.sub.1 -C.sub.6) alkyl, R.sup.5 is hydrogen, (C.sub.1 -C.sub.6) alkyl, phenyl where the alkyl or phenyl radical may also be substituted by halogen atoms; in which an anthranilic acid derivative of formula (II), in which R.sup.1 to R.sup.5 have the above meaning and R.sup.6 is hydrogen, (C.sub.1 -C.sub.6) alkyl or phenyl, where the alkyl or phenyl radical may also be substituted by halogen atoms, is reacted with a metal cyanate and hydrogen chloride in the presence of an inert solvent.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: December 14, 1999
    Assignee: Clariant GmbH
    Inventors: Theodor Papenfuhs, Ralf Pfirmann, Stefan Krause, Doris Neumann-Grimm
  • Patent number: 5973189
    Abstract: Compounds have the formula (I), ##STR1## in which R stands for straight-chain or branched (C.sub.1 -C.sub.20) alkyl, phenyl or CH.sub.2 phenyl, the alkyl group or phenyl group being optionally substituted by halogen, (C.sub.1 -C.sub.4) alkyl, (C.sub.1 -C.sub.4) alkoxy, and R.sup.1, R.sup.2, R.sup.3, R.sup.4 independently represent hydrogen, halogen, OH, NO.sub.2, (C.sub.1 -C.sub.6) alkoxy, (C.sub.1 -C.sub.6) alkyl or halogen-substituted (C.sub.1 -C.sub.6)-alkyl. Also disclosed is a process for preparing these compounds.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: October 26, 1999
    Assignee: Clariant GmbH
    Inventors: Theodor Papenfuhs, Ralf Pfirmann, Doris Neumann-Grimm, Stefan Krause
  • Patent number: 5945556
    Abstract: A process for preparing N-carboxymethylene-4-chloroanthranilic acid, and its dialkyl esters. The invention relates to a process for preparing N-carboxymethylene-4-chloroanthranilic acid and its dialkyl esters, which comprises reacting 2,4-dichlorobenzoic acid in the presence of a base, of a solvent and of a catalyst with glycine to give N-carboxymethylene-4-chloroanthranilic acid and, where appropriate, reacting the latter in the presence of a base and of a solvent with a dialkyl sulfate, dialkyl carbonate or alkyl halide to give the dialkyl ester.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: August 31, 1999
    Assignee: Clariant GmbH
    Inventors: Theodor Papenfuhs, Ralf Pfirmann, Stefan Krause, Doris Neumann-Grimm
  • Patent number: 5821385
    Abstract: The present invention relates to a process for the preparation of N-(2-carboxy-5-chloro-phenyl)glycine of the formula (1) ##STR1## which comprises reacting 2,4-dichlorobenzoic acid of the formula (2) ##STR2## with glycine and a base in water at a temperature of 50.degree. to 200.degree. C. in the presence of copper and oxygen at a pH of 7 to 13.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: October 13, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Stefan Krause, Doris Neumann-Grimm, Theodor Papenfuhs
  • Patent number: 5811572
    Abstract: Process for the preparation of N-carboxymethyleneanthranilic acid esters of the formula (3) ##STR1## by reacting a compound of the formula (1) ##STR2## in which R' is hydrogen or a straight-chain or branched alkyl radical having 1 to 4 carbon atoms and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and independently of one another are hydrogen, halogen, NO.sub.2, a straight-chain or branched alkyl, alkoxy or halogenated alkyl radical having in each case 1 to 6 carbon atoms, with a glyoxylic acid ester of the formula (2)OHC--COOR (2)in which R is a straight-chain or branched alkyl radical having 1 to 20 carbon atoms, phenyl radical or benzyl radical, which are unsubstituted or mono- or polysubstituted by halogen or an alkyl or alkoxy group having in each case 1 to 4 carbon atoms, in the presence of a solvent at 0.degree. to 200.degree. C.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: September 22, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Theodor Papenfuhs, Andreas Dierdorf, Stefan Krause, Doris Neumann-Grimm