Patents by Inventor Carl Casser
Carl Casser 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).
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Patent number: 6414192Abstract: The invention provides a process for preparing 4-aminodiphenylamine, an important starting product for synthesizing antioxidants and stabilizers in the rubber and polymer industry, by hydrogenating nitrosobenzene with hydrogen in the presence of a proton acid as catalyst and in the presence of a hydrogenating catalyst, optionally in the presence of an inert organic solvent and thermally decomposing the 4-ADPA ammonium salt produced in this way, wherein 4-ADPA is obtained. 4-aminodiphenylamine is produced in good yields and high purity by the process according to the present invention. Furthermore, no effluent is produced, which makes the process particularly economic and ecological.Type: GrantFiled: November 6, 2001Date of Patent: July 2, 2002Assignee: Bayer AktiengesellschaftInventors: Michael Schelhaas, Carl Casser, Dietmar Bielefeldt, Pieter Ooms, Joachim Haider, Manfred Jautelat, Christian Laue, Henry Giera
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Publication number: 20020055652Abstract: The invention provides a process for preparing 4-aminodiphenylamine, an important starting product for synthesizing antioxidants and stabilizers in the rubber and polymer industry, by hydrogenating nitrosobenzene with hydrogen in the presence of a proton acid as catalyst and in the presence of a hydrogenating catalyst, optionally in the presence of an inert organic solvent and thermally decomposing the 4-ADPA ammonium salt produced in this way, wherein 4-ADPA is obtained.Type: ApplicationFiled: November 6, 2001Publication date: May 9, 2002Inventors: Michael Schelhaas, Carl Casser, Dietmar Bielefeldt, Pieter OOms, Joachim Haider, Manfred Jautelat, Christian Laue, Henry Giera
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Patent number: 6242641Abstract: The present invention relates to compounds selected from formula I wherein R1, R2, R3 and R4 are the same or different and represent hydrogen, C1, to C6-alkyl, C5 to C6-cycloalkyl, phenyl and halogen, m and n are the same or different and represent the 2, 3, 4 or 5, X, A and B represent carbon and Y1, Y2, Z1 and Z2 are the same or different and represent hydrogen, hydroxyl (OH), amino (NH2), isocyanato (NCO) or 4-hydroxyphenyl.Type: GrantFiled: March 22, 1999Date of Patent: June 5, 2001Assignee: Bayer AktiengesellschaftInventors: Manfred Jautelat, Carl Casser, Hanns-Peter Müller, Manfred Hajek
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Patent number: 6166256Abstract: The present invention provides a process for preparing (4-nitroso-phenyl)phenyl-hydroxylamine which is characterized in that nitrobenzene is reacted in the presence of hydroxide and/or oxide-containing bases, optionally in the presence of solvents, at temperatures of 20 to 180.degree. C. and pressures of 0.1 to 10 bar.The process according to the invention has the particular advantage that it uses inexpensive and cost-effective nitrobenzene as starting material instead of the nitrosobenzene conventionally used hitherto.Type: GrantFiled: May 8, 2000Date of Patent: December 26, 2000Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Carl Casser, Pieter Ooms, Michael Schelhaas, Christian Laue, Michaela Meiers, Gerhard Braun
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Patent number: 6054589Abstract: A novel process for the preparation of 2-chloro-benzimidazole derivatives of the formula ##STR1## in which A represents optionally halogenated alkylene having 1 or 2 carbon atoms,which process comprises reaction 1,3-dihydro-benzimidazol(ethi)ones of the formula ##STR2## in which X represents oxygen or sulphur,with phosphorus oxychloride.Novel 1,3-dihydro-benzimidazol(ethi)ones of the formula(II) and process for their preparation.Type: GrantFiled: July 17, 1998Date of Patent: April 25, 2000Assignee: Bayer AktiengesellschaftInventors: Michael Conrad, Lutz Assmann, Heinz-Jurgen Wroblowsky, Carl Casser, Dietmar Bielefeldt
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Patent number: 6028200Abstract: A novel process for the preparation of 2-chloro-benzimidazole derivatives of the formula in whichA represents optionally halogenated alkylene having 1 or 2 carbon atoms,which process comprises reacting 1,3-dihydro-benzimidazol(ethi)ones of the formula ##STR1## in which X represents oxygen or sulphur,with phosphorus oxychloride.Novel 1,3-dihydro-benzimidazol(ethi)ones of the formula (II) and processes for their preparation.Type: GrantFiled: May 7, 1999Date of Patent: February 22, 2000Assignee: Bayer AktiengesellschaftInventors: Michael Conrad, Lutz Assmann, Heinz-Jurgen Wroblowsky, Carl Casser, Dietmar Bielefeldt
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Patent number: 6001535Abstract: Monomers with cyclic carbonate groups of the formula I are suitable for the production of photosensitive recording materials, for example for the production of offset printing plates ##STR1## in which A means an (n+m)-valent hydrocarbon residue with 3 to 30 C atoms, which may be OH-substituted and may contain up to 8 ether bridges,R means H or methyl;n means an integer from 1 to 5;m means an integer from 1 to 3, providing that n+m is at least 3.Type: GrantFiled: October 1, 1997Date of Patent: December 14, 1999Assignee: Agfa Gevaert AGInventors: Wolfgang Podszun, Ludger Heiliger, Michael Muller, Carl Casser, Friedrich Bruder
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Patent number: 5905170Abstract: The present invention relates to a process for the production of 1-amino-1-methyl-3(4)-aminomethylcyclohexane bya) simultaneously reacting 4(5)-aminomethyl-1-methylcyclohexene (CMA), hydrocyanic acid and aqueous sulphuric acid at temperatures of 60.degree. C. to 120.degree. C., preferably 80.degree. C. to 120.degree. C. to form 1-formamido-1-methyl-3(4)-aminomethylcyclohexane (FMA) in a first stage,b) adding water and hydrolyzing 1-formamido-1-methyl-3 (4)-aminomethylcyclohexane (FMA) and unreacted hydrocyanic acid in a second stage andc) adding a base and isolating 1-amino-1-methyl-3 (4)-aminomethylcyclohexane (AMCA) by extraction from the reaction mixture obtained in the second stage of the reaction, optionally after removing of formic acid.Type: GrantFiled: March 11, 1998Date of Patent: May 18, 1999Assignee: Bayer AktiengesellschaftInventors: Konrad Fischer, Oswald Wilmes, Dieter Arlt, Carl Casser, Peter Maas, Pierre Woestenborghs, Theo Van der Knaap
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Patent number: 5900507Abstract: The present invention relates to a process for the preparation of 1-amino-1-methyl-3(4)-aminomethyl cyclohexane (AMCA) bya) catalytically hydrogenating 1-formamido-1-methyl-3(4)-cyano cyclohexane (FMC) in a first reaction stage to form 1-formamido-1-methyl-3(4)-aminomethyl cyclohexane (FMA), 1-amino-1-methyl-3(4)-formamidomethyl cyclohexane (AMF), 1-formamido-1-methyl-3(4)-formamidomethyl cyclohexane (FMF) and/or AMCA, andb) reacting FMA, AMF and/or FMF in a second reaction stage with an alkaline compound to from AMCA and a formic acid derivative, andc) separating the reaction mixture obtained in step b) into components by fractional distillation and/or by crystallization and filtration.The present invention is also relates to carrying the hydrogenation reaction of step a) in the presence of a formulating agent to form 1-formamido-1-methyl-3(4)-formamidomethyl cyclohexane (FMF).Type: GrantFiled: March 11, 1998Date of Patent: May 4, 1999Assignee: Bayer AktiengesellschaftInventors: Konrad Fischer, Oswald Wilmes, Dieter Arlt, Carl Casser, Peter Maas, Pierre Woestenborghs, Theo Van Der Knaap, Raf Reintjens
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Patent number: 5877323Abstract: Herbicidally active 1-aryl-4-carbamoyl-tetrazolinones of the formula (I) ##STR1## in which Ar represents optionally substituted aryl,R.sup.1 represents in each case optionally substituted alkyl, alkenyl, alkinyl or alkoxy, andR.sup.2 represents in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl, or, together with R.sup.1, represents alkanediyl,are obtained in good yields and at high purity by reacting 1-aryl-tetrazolinones of the formula (II) with phosgene in the presence of a diluent at temperatures of between 0.degree. C. and 150.degree. C. ("first process step"), and reacting the resulting (novel) 1-aryl-4-chlorocarbonyl-tetrazolinones of the formula (III) with amines of the formula (IV) in the presence of a diluent, and, where appropriate, in the presence of a further basic compound, at temperatures of between -20.degree. C. and +100.degree. C.Type: GrantFiled: February 12, 1998Date of Patent: March 2, 1999Assignee: Bayer AktiengesellschaftInventors: Reinhard Lantzsch, Uwe Stelzer, Carl Casser
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Patent number: 5874586Abstract: Herbicidally active 1-aryl-4-carbamoyl-tetrazolinones of the formula (I) ##STR1## in which Ar represents optionally substituted aryl,R.sup.1 represents in each case optionally substituted alkyl, alkenyl, alkinyl or alkoxy, andR.sup.2 represents in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl, or, together with R.sup.1, represents alkanediyl,are obtained in good yields and at high purity by reacting 1-aryl-tetrazolinones of the formula (II) with phosgene in the presence of a diluent at temperatures of between 0.degree. C. and 150.degree. C. ("first process step"), and reacting the resulting (novel) 1-aryl-4-chlorocarbonyl-tetrazolinones of the formula (III) with amines of the formula (IV) in the presence of a diluent, and, where appropriate, in the presence of a further basic compound, at temperatures of between -20.degree. C. and +100.degree. C.Type: GrantFiled: February 4, 1998Date of Patent: February 23, 1999Assignee: Bayer AktiengesellschaftInventors: Reinhard Lantzsch, Uwe Stelzer, Carl Casser
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Patent number: 5814669Abstract: The invention relates to novel amino acid derivatives, to a process for their preparation and to their use as pesticides, in particular as fungicides, and as intermediates for preparing known substituted amino acid derivatives with fungicidal activity.Type: GrantFiled: December 20, 1996Date of Patent: September 29, 1998Assignee: Bayer AktiengesellschaftInventors: Uwe Stelzer, Carl Casser, Thomas Seitz
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Patent number: 5808104Abstract: Polymerizable aromatic carboxylic acids and carboxylic acid anhydrides with cyclic carbonate groups which are useful for improving adhesion of synthetic dental filling materials.Type: GrantFiled: July 23, 1997Date of Patent: September 15, 1998Assignee: Heraeus Kulzer GmbHInventors: Wolfgang Podszun, Ludger Heiliger, Werner Finger, Martin Grunwald, Carl Casser
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Patent number: 5763622Abstract: The invention relates to urethane acrylates and urethane methacrylates containing cyclic carbonate groups, and use thereof in dental materials and lithographic plates.Type: GrantFiled: November 20, 1996Date of Patent: June 9, 1998Assignee: Bayer AGInventors: Wolfgang Podszun, Joachim Kruger, Werner Finger, Ludger Heiliger, Carl Casser
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Patent number: 5675010Abstract: The present invention relates to new chloropyridinium chlorides of the general formula (I) ##STR1## in which R.sup.1 represents in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, arylalkyl or heteroarylalkyl,R.sup.2 represents optionally substituted alkyl, andR.sup.3 represents hydrogen, halogen or optionally substituted alkyl,to a process for their preparation and to their use for the preparation of chloropyridines.Type: GrantFiled: May 8, 1996Date of Patent: October 7, 1997Assignee: Bayer AktiengesellschaftInventors: Reinhard Lantzsch, Klaus Jelich, Carl Casser, Christoph Mannheims, Knud Lawrenz
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Patent number: 5621119Abstract: The invention relates to diacrylates and dimethacrylates having cyclic carbonate groups, and their use in dental materials.Type: GrantFiled: July 14, 1995Date of Patent: April 15, 1997Assignee: Heraeus Kulzer GmbH & Co., KGInventors: Wolfgang Podszun, Klaus Schapers, Werner Finger, Ludger Heiliger, Carl Casser
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Patent number: 5541332Abstract: A process for the preparation of a chloropyridine of the formula ##STR1## which comprises reacting an enamide of the formula ##STR2## with a chlorinating agent in the presence of a di-substituted formamide ##STR3## in which R.sup.4 and R.sup.5 each individually is alkyl or cycloalkyl or together are alkanediyl, at a temperature between about -30.degree. C. and 100.degree. C., thereby to produce a compound of the formula ##STR4## and subjecting said compound to thermal cleavage. Compounds I are novel. Compounds IV are known intermediates for agrochemicals and pharmaceuticals.Type: GrantFiled: January 4, 1995Date of Patent: July 30, 1996Assignee: Bayer AktiengesellschaftInventors: Reinhard Lantzsch, Klaus Jelich, Carl Casser, Christoph Mannheims, Knud Lawrenz
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Patent number: 5276213Abstract: Dihydroxydiphenyl bicycloalkanes characterized in that they contain 9 to 13 ring C atoms in the bicycloaliphatic component are disclosed. The disclosed compounds were found to be suitable for the preparation of high molecular weight, thermoplastic polycarbonate resins having favorable properties.Type: GrantFiled: February 10, 1993Date of Patent: January 4, 1994Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Uwe Westeppe, Gerd Fengler, Manfred Hajek, Carl Casser, Helmut Waldmann
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Patent number: 5227458Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkylandX represents carbon with the proviso that, at at least one atom X, both R.sup.3 and R.sup.4 are alkyl,a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.Type: GrantFiled: March 31, 1992Date of Patent: July 13, 1993Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
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Patent number: 5212280Abstract: Dihydroxydiphenyl bicycloalkanes characterized in that they contain 9 to 13 ring C atoms in the bicycloaliphatic component are disclosed. The disclosed compounds were found to be suitable for the preparation of high molecular weight, thermoplastic polycarbonate resins having favorable properties.Type: GrantFiled: September 30, 1991Date of Patent: May 18, 1993Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Uwe Westeppe, Gerd Fengler, Manfred Hajek, Carl Casser, Helmut Waldmann