Patents by Inventor Norbert Meyer
Norbert Meyer 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: 5158598Abstract: Bithienyl derivatives of the formula Ia ##STR1## where the substituents have the following meanings: R.sup.1, R.sup.2 hydrogen, halogen, nitro, formyl, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -haloalkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.3 -C.sub.8 -cycloalkoxy, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -haloalkylthio, substituted or unsubstituted C.sub.1 -C.sub.6 -alkylcarbonyl, substituted or unsubstituted C.sub.3 -C.sub.6 -cycloalkylcarbonyl, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxycarbonyl and/or phenylcarbonyl;R.sup.3 hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -haloalkyl or C.sub.1 -C.sub.4 -haloalkoxy;A --CSNH.sub.Type: GrantFiled: August 4, 1989Date of Patent: October 27, 1992Assignee: BASF AktiengesellschaftInventors: Reiner Kober, Joachim Leyendecker, Rainer Seele, Klaus Fischer, Hans Theobald, Bruno Wuerzer, Karl-Otto Westphalen, Norbert Meyer
-
Cyclohexenone derivatives, their preparation and their use as herbicides and plant growth regulators
Patent number: 5154753Abstract: Cyclohexenone derivatives of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, Y and Z have the meanings given in the disclosure, processes for their manufacture, herbicidal and growth-regulating agents containing the novel active ingredients, and processes for combating unwanted plant growth and for regulating plant growth.Type: GrantFiled: August 14, 1991Date of Patent: October 13, 1992Assignee: BASF AktiengesellschaftInventors: Norbert Meyer, Johann Jung, Wilhelm Rademacher, Dieter Kolassa, Rainer Becker, Dieter Jahn, Michael Keil, Ulrich Schirmer, Bruno Wuerzer -
Patent number: 5123955Abstract: Phenylalkenylcarboxylic acid and esters thereof of the general formula I ##STR1## where X is hydrogen or fluorine, R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 - or C.sub.6 -cycloalkyl, (C.sub.1 -C.sub.4 -alkoxy)-C.sub.2 -C.sub.4 -alkyl or (C.sub.1 -C.sub.4 -alkylthio)-C.sub.2 -C.sub.4 -alkyl; W is a divalent radical --CH.dbd.CR.sup.2 --; --CH.dbd.CY--; --CH.dbd.CR.sup.2 --CH.sub.2 --; --CH.dbd.CR.sup.2 --CH.dbd.CR.sup.3 -- or ##STR2## where Y is chlorine or bromine and R.sup.2 and R.sup.3 are each hydrogen or C.sub.1 -C.sub.4 -alkyl, with the proviso that X is not F when W is --CH.dbd.CR.sup.2 --, their manufacture, and their use as herbicides.Type: GrantFiled: October 23, 1989Date of Patent: June 23, 1992Inventors: Peter Plath, Karl Eicken, Norbert Goetz, Jochen Wild, Norbert Meyer, Bruno Wuerzer
-
Patent number: 5123952Abstract: 5-Amino-6-pyridazones of the general formulae Ia and Ib ##STR1## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl which may carry up to three halogen atoms, R.sup.2 is C.sub.1 -C.sub.4 -alkyl or C.sub.3 -C.sub.6 -alkenyl, where these groups may carry up to two phenyl radicals, or C.sub.3 -C.sub.6 -alkynyl, A is --CO-- or --SO.sub.2 --, B is C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl or C.sub.2 -C.sub.6 -alkynyl, where these groups may carry up to three of the following radicals: halogen, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio and/or phenyl; an isocyclic or heterocyclic C.sub.3 -C.sub.7 -cycloalkyl group or an isocyclic or heterocyclic C.sub.3 -C.sub.7 -cycloalkenyl group, where these groups may be fused with one or two cycloalkyl groups of this type or with one or two benzene nuclei, where the total number of ring members is from 3 to 16 and these cyclic radicals may carry up to three of the following groups: halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.2 - C.sub.Type: GrantFiled: July 12, 1989Date of Patent: June 23, 1992Inventors: Ulrich Wriede, Bruno Wuerzer, Norbert Meyer, Karl-Otto Westphalen
-
Patent number: 5117005Abstract: Naphthindazole-4,9-quinones of the formula ##STR1## where R.sup.1 to R.sup.5 have the meanings given in the disclosure, and their use for combating unwanted plant growth.Type: GrantFiled: August 15, 1990Date of Patent: May 26, 1992Assignee: BASF AktiengesellschaftInventors: Klaus Ditrich, Gerhard Hamprecht, Bruno Wuerzer, Norbert Meyer, Karl-Otto Westphalen, Hartmut Laatsch
-
Patent number: 5104441Abstract: Substituted sulfonylureas of the formula I ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.4 -alkenyl or alkynyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.3 -C.sub.6 -alkoxyalkyl, C.sub.4 -C.sub.6 -haloalkoxyalkyl or C.sub.5 -C.sub.6 -cycloalkyl,R.sup.2 is hydrogen, methyl or ethyl,R.sup.3 is hydrogen, halogen, methyl or methoxy,R.sup.4 is hydrogen, methyl or methoxy,X is N or C--H,and Hal is fluorine, chlorine or bromine, and alkali metal or alkaline earth metal salts thereof, with the proviso that R.sup.1 is not methyl when Hal is chlorine and X is N, a process for the manufacture of sulfonylureas of the formula I and their use as herbicides.Type: GrantFiled: November 28, 1990Date of Patent: April 14, 1992Assignee: BASF AktiengesellschaftInventors: Gerhard Hamprecht, Helmut Hagen, Thomas Liese-Sauer, Norbert Meyer, Bruno Wuerzer
-
Patent number: 5089042Abstract: N-phenyltetrahydrophthalimides of the formula I ##STR1## where R.sup.1 is hydrogen or halogen, R.sup.2 is halogen and A is a substituent of the formula ##STR2## where X is oxygen or sulfur, n is zero or one, R.sup.3 is hydrogen or C.sub.1 -C.sub.6 -alkoxycarbonyl or C.sub.1 -14 C.sub.3 -alkyl which is unsubstituted or substituted by halogen, cyano, hydroxyl, mercapto, C.sub.1 -C.sub.6 -alkoxycarbonyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.3 -C.sub.6 -alkenyloxy, C.sub.3 -C.sub.6 -alkenylthio, C.sub.3 -C.sub.6 -alkynyloxy, C.sub.3 -C.sub.6 -alkynylthio or C.sub.1 -C.sub.4 -acyloxy, or is hydroxyl or carboxyl or is C.sub.1 -C.sub.4 -alkylthio-C.sub.1 - or C.sub.2 -alkyl or C.sub.1 -C.sub.4 -alkoxy-C.sub.1 - or -C.sub.2 -alkyl which is substituted in the alkyl ether or thioehter moiety by C.sub.1 -C.sub.6 -alkoxycarbonyl, R.sup.4 is hydrogen or C.sub.1 -C.sub.3 -alkyl, Z is methyleneoxymethylene, methylenethiomethylene or ethenylene (--CH.dbd.CH--) and R.sup.5 and R.sup.Type: GrantFiled: April 16, 1990Date of Patent: February 18, 1992Assignee: BASF AktiengesellschaftInventors: Lothar Rueb, Karl Eicken, Barbara Schwalge, Peter Plath, Bruno Wuerzer, Norbert Meyer
-
Patent number: 5085689Abstract: Cyclohexenone compounds of the formula I ##STR1## where the substituents have the following meanings: R.sup.1 substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, phenyl or benzyl;A oxygen N--OR.sup.2, NR.sup.3 ;R.sup.2 substituted or unsubstituted alkyl, alkenyl, alkynyl;R.sup.3 hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl, alkylthioalkyl, substituted or unsubstituted phenyl or benzyl;processes for their manufacture and their use for combating unwanted plant growth and for regulating plant growth.Type: GrantFiled: October 10, 1990Date of Patent: February 4, 1992Assignee: BASF AktiengesellschaftInventors: Juergen Kast, Norbert Meyer, Ulf Misslitz, Juergen Schubert, Johann Jung, Wilheim Rademacher, Karl-Otto Westphalen, Bruno Wuerzer
-
Patent number: 5081301Abstract: Hydroxylamine derivatives have the general formula IAryl--A--O--B IwhereAryl is an unsubstituted or substituted, mononuclear or binuclear, isocyclic radical;A is a 1,4-butenylene group of the general formulae IIa or IIb ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are each hydrogen, halogen, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkenyl;B is NH.sub.2 or a dicarboximide group of the general formula III ##STR2## where Z is unsubstituted or substituted phenylene, naphthylene, pyridinylene, cyclopentylene, cyclohexylene, cyclohexenylene, C.sub.2 -C.sub.4 -alkenylene or C.sub.2 -C.sub.4 -alkylene. The dicarboximides are intermediates for the compounds wherein B is NH.sub.2. The latter are used in synthesizing herbicidal compounds.Type: GrantFiled: October 30, 1989Date of Patent: January 14, 1992Inventors: Jochen Wild, Albrecht Harreus, Ulrich Schirmer, Norbert Meyer, Juergen Kast, Dieter Kolassa
-
Patent number: 5080710Abstract: N-aryltetrahydrophthalimide compounds of the general formula I ##STR1## where n, R.sup.1, Y, R.sup.2 and R.sup.3 have the meanings stated in the claims and description, and a method for controlling undesirable plant growth.Type: GrantFiled: January 5, 1990Date of Patent: January 14, 1992Assignee: BASF AktiengesellschaftInventors: Lothar Rueb, Karl Eicken, Peter Plath, Barbara Schwalge, Karl-Otto Westphalen, Bruno Wuerzer, Norbert Meyer
-
Patent number: 5080708Abstract: Isoxazole(isothiazole)-5-carboxamides of the formula ##STR1## where X is oxygen or sulfur,R.sup.1 is hydrogen, substituted or unsubstituted alkyl, alkoxy, substituted or unsubstituted cycloalkyl, a 5- or 6-membered heterocyclic radical having one or two heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen, and which may be substituted, or substituted or unsubstituted phenyl, orR.sup.2 is formyl, 4,5-dihydrooxazol-2-yl or a radical of the formula COYR.sup.5 or CONR.sup.6 R.sup.7, whereY is oxygen or sulfur,R.sup.5 ishydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, haloalkenyl, substituted or unsubstituted alkynyl,cycloalkyl,cycloalkenyl,substituted or unsubstituted phenyl,a 5- or 6-membered heterocyclic radical having one or two heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen,cycloalkanimino, phthalimido, succinimido, or a radical ##STR2## R.sup.3 and R.sup.Type: GrantFiled: April 13, 1989Date of Patent: January 14, 1992Assignee: BASF AktiengesellschaftInventors: Wolfgang Freund, Thomas Kuekenhoehner, Gerhard Hamprecht, Bruno Wuerzer, Karl-Otto Westphalen, Norbert Meyer, Hans Theobald
-
Patent number: 5076831Abstract: Substituted 1,8-naphthalenedicarboximides of the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, X, Y, and Z have the meanings recited in the disclosure are disclosed as new compounds suitable for use as antidotes in herbicidal compositions.Type: GrantFiled: November 20, 1990Date of Patent: December 31, 1991Assignee: BASF AktiengesellschaftInventors: Thomas Saupe, Norbert Meyer, Peter Plath, Ulrich Schirmer, Bruno Wuerzer, Karl-Otto Westphalen, Manfred Patsch, Juergen Pfister
-
Patent number: 5074904Abstract: Naphthindazole-4,9-quinones of the formula ##STR1## where R.sup.1 to R.sup.5 have the meanings given in the disclosure, and their use for combating unwanted plant growth.Type: GrantFiled: August 15, 1990Date of Patent: December 24, 1991Assignee: BASF AktiengesellschaftInventors: Klaus Ditrich, Gerhard Hamprecht, Bruno Wuerzer, Norbert Meyer, Karl-Otto Westphalen, Hartmut Laatsch
-
Patent number: 5074903Abstract: Cyclohexenone derivative of the formula ##STR1## where A is oxygen or NOR.sup.8, where R.sup.8 is alkyl, alkenyl, alkynyl, haloalkyl or haloalkenyl, chlorothienyl or alkoxyalkylB is O, S, SO or SO.sub.2,X is hydrogen or methoxycarbonyl,R.sup.1 is hydrogen, carbonylalkyl, benzoyl or a cation,R.sup.2 is alkyl,R.sup.3 and R.sup.4 are hydroxyl, chlorine, bromine, thioalkylcarboxyl, thiocarbonylalkyl, alkylcarbonyloxy, alkoxy, or alkylthio, or R.sup.3 and R.sup.4 together epoxy,R.sup.5 and R.sup.6 are hydrogen or methyl or R.sup.5 and R.sup.6 are together methyleneoxyethylene, andR.sup.7 is hydrogen or methyl,and herbicides containing these compounds.Type: GrantFiled: August 13, 1990Date of Patent: December 24, 1991Assignee: BASF AktiengesellschaftInventors: Dieter Jahn, Michael Keil, Dieter Kolassa, Ulrich Schirmer, Bruno Wuerzer, Norbert Meyer, Johann Jung, Wilhelm Rademacher
-
Patent number: 5069710Abstract: N-((6-Trifluoromethylpyrimidin-2-yl)- aminocarbonyl)-2-carboalkoxybenzenesulfonamides of the general formula Ia ##STR1## where the substituents have the following meanings: R.sup.1 is hydrogen or halogen;R.sup.2 is hydrogen, C.sub.1 -C.sub.5 -alkyl, C.sub.3 -C.sub.4 -alkenyl, C.sub.3 -C.sub.4 -alkynyl, C.sub.1 -C.sub.5 -haloalkyl, C.sub.3 -C.sub.5 -alkoxyalkyl, C.sub.3 -C.sub.5 -haloalkoxyalkyl or C.sub.5 -C.sub.6 -cycloalkyl,R.sup.3 is hydrogen, C.sub.1 -C.sub.2 -alkyl, allyl, propargyl or C.sub.1 -C.sub.5 -alkoxy,R.sup.4 is halogen, C.sub.1 -C.sub.2 -alkyl, C.sub.1 -C.sub.3 -alkylthio or C.sub.1 -C.sub.3 -alkylamino,R.sup.3 not denoting hydrogen or C.sub.1 -C.sub.2 -alkyl when R.sup.4 is C.sub.1 -C.sub.2 -alkyl, and their environmentally tolerated salts, processes for their manufacture, and their use.Type: GrantFiled: April 14, 1989Date of Patent: December 3, 1991Assignee: BASF AktiengesellschaftInventors: Karl-Otto Westphalen, Gerhard Hamprecht, Bruno Wuerzer, Norbert Meyer
-
Patent number: 5069708Abstract: Herbicidal agents containing a pyrimido[5,4-e]-as-triazine-5,7-(6H,8H)-dione Ia ##STR1## (R.sup.1, R.sup.2 .dbd.H, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl, C.sub.2 -C.sub.8 -alkenyl, phenyl or benzyl, R.sup.3 .dbd.H, halogen, nitro, C.sub.1 -C.sub.8 -alkyl which may carry up to three further substituents, C.sub.2 -C.sub.6 -alkenyl, phenyl-C.sub.2 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -cycloalkyl which may carry up to 3 C.sub.1 -C.sub.4 -alkyl substituents, a 5- or 6-membered heterocyclic structure where up to 2 of the ring members are O, S or NR.sup.4 ; --CO--R.sup.4 or --CO--O--R.sup.4 ; phenyl or hetaryl, which may carry up to 3 further substituents; or ZR.sup.6 ; R.sup.4 .dbd.H, C.sub.1 -C.sub.6 -alkyl; Z.dbd.O, S or --N(R.sup.7)--; R.sup.6 .dbd.H, C.sub.1 -C.sub.6 -alkyl, phenyl or benzyl, which may carry up to 3 further substituents; R.sup.7 .dbd.H, C.sub.1 -C.sub.6 -alkyl or R.sup.6 and R.sup.Type: GrantFiled: July 3, 1990Date of Patent: December 3, 1991Assignee: BASF AktiengesellschaftInventors: Norbert Meyer, Ulrich Shirmer, Peter Plath, Bruno Wuerzer, Karl-Otto Westphalen
-
Patent number: 5062884Abstract: N-substituted 3,4,5,6-tetrahydrophthalimides and their intermediates of the general formula I ##STR1## where A is --NO.sub.2, --NH.sub.2 or ##STR2## corresponding to the compounds Ia, Ib and Ic, B is --CH.sub.2 --, --CH.sub.2 --CHR.sup.1 --, --CH.sub.2 --CHR.sup.1 --CH.sub.2 --, --CH.dbd., --CH.dbd.CR.sup.1 -- or --CH.dbd.CR.sup.1 --CH.dbd., R.sup.1 being --H, --Cl, --Br or --CH.sub.3, D is ##STR3## depending on the terminal group B, X is --H, --Cl or --Br, Y is --H, C.sub.1 -C.sub.7 --alkyl, --Cl, --Br, --CN, --CONH.sub.2 --CO.sub.2 R.sup.2, where R.sup.2 is H, C.sub.1 -C.sub.6 -alkyl, C.sub.5 -- or C.sub.6 -cycloalkyl, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkylmercapto-C.sub.2 -C.sub.4 -alkyl, propargyl, benzyl, .alpha.-phenylethyl, .alpha.-phenylpropyl, C.sub.2 -C.sub.4 -alkyl which is monosubstituted, disubstituted or trisubstituted by F or Cl, or CH.sub.3 -substituted or Cl-substituted allyl, and Z is --COOR.sup.2, --CONR.sup.3 R.sup.4, ##STR4## where R.sup.3 and R.sup.Type: GrantFiled: January 16, 1990Date of Patent: November 5, 1991Assignee: BASF AktiengesellschaftInventors: Peter Plath, Karl Eicken, Norbert Goetz, Jochen Wild, Norbert Meyer, Bruno Wuerzer
-
Patent number: 5034047Abstract: Cyclohexenone derivatives of the general formula I ##STR1## where the substituents have the following meanings: R.sup.1 : substituted or unsubstituted C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -alkenyl or C.sub.3 -C.sub.6 -alkynyl, phenyl, benzyl or thenyl;R.sup.2 : substituted or unsubstituted C.sub.1 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl or phenyl;R.sup.3 : hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.10 -alkylcarbonyl, C.sub.1 -C.sub.6 -alkylsulfonyl, C.sub.1 -C.sub.4 -trialkylsilyl, C.sub.1 -C.sub.4 -dialkylphosphonyl, C.sub.1 -C.sub.4 -dialkylthiophosphonyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkenylcarbonyl, C.sub.3 -C.sub.6 -alkynyl or substituted or unsubstituted benzoyl- or phenylsulfonyl;R.sup.4 : hydrogen, cyano, halogen, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxycarbonyl;A: a substituted or unsubstituted C.sub.1 -C.sub.Type: GrantFiled: August 24, 1990Date of Patent: July 23, 1991Assignee: BASF AktiengesellschaftInventors: Dieter Kolassa, Juergen Kast, Thomas Kuekenhoehner, Norbert Meyer, Karl-Otto Westphalen, Bruno Wuerzer
-
Patent number: 5034049Abstract: Thiophene-2-carboxylic acid derivatives of the general formula I ##STR1## where R.sup.1 to R.sup.3 are each hydrogen, halogen, branched or straight-chain C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.1 -C.sub.6 -haloalkyl, C.sub.1 -C.sub.6 -haloalkoxy, nitro, cyano, unsubstituted phenyl or phenyl which is mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, halogen, C.sub.1 -C.sub.5 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.5 -haloalkoxy;X is --OR.sup.4 or --NH--OR.sup.5,R.sup.4 being branched or straight-chain C.sub.3 -C.sub.10 -alkynylalkyl which is unsubstituted or substituted by halogen; andR.sup.5 being branched or straight-chain C.sub.1 -C.sub.5 -alkyl which is unsubstituted or substituted by halogen, or branched or straight-chain C.sub.3 -C.sub.10 -alkynylalkyl which is unsubstituted or substituted by halogen;with the proviso that R.sup.4 is not propargyl when R.sup.2 and R.sup.3 are both hydrogen or when R.sup.2 is halogen or R.sup.3 is chlorine, methyl or methoxy.Type: GrantFiled: January 9, 1990Date of Patent: July 23, 1991Assignee: BASF AktiengesellschaftInventors: Reiner Kober, Rainer Seele, Hans-Juergen Neubauer, Thomas Saupe, Bruno Wuerzer, Norbert Meyer, Karl-Otto Westphalen
-
Patent number: 5030727Abstract: The process of manufacturing thiazolo-(2,3-b)-quinoazolones of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are defined in the disclosure, wherein either a) an anthranilamide derivative of the formula II ##STR2## where R.sup.5 and R.sup.6 are hydrogen or C.sub.1 -C.sub.4 -alkyl, is reacted with a thiazole derivative of the formula III ##STR3## where X is fluorine, chlorine, bormine, alkylsulfonyl or arylsulfonyl, or b) for certain radicals R.sup.4' from the group R.sup.4 - a thiazolo-(2,3-b)-quinazolone of the general formula IV ##STR4## is reacted with a nucleophile R.sup.4' -H, where R.sup.4' is alkoxy, alkylthio or unsubstituted or halogen-, alkyl-, haloalkyl-, nitro- or alkoxy-substituted phenoxy or thiophenyl, or an alkali metal, alkaline earth metal or ammonium salt of an alcohol.Type: GrantFiled: April 12, 1990Date of Patent: July 9, 1991Assignee: BASF AktiengesellschaftInventors: Gerhard Hamprecht, Guenther Seybold, Norbert Meyer, Bruno Wuerzer