Patents by Inventor Erwin Fleckenstein
Erwin Fleckenstein 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: 4160764Abstract: Azo-dyestuff of the formula ##STR1## in which D represents nitrophenylene, ##STR2## DINITRO-PHENYLENE, NITRO-CYANO-PHENYLENE, NITRO-CHLORO-PHENYLENE, NITRO-BROMO-PHENYLENE, TRICHLORO-PHENYLENE, NITRO-DICHLORO-PHENYLENE, DINITRO-CHLORO-PHENYLENE, DINITRO-CYANO-PHENYLENE, NITRO-BROMO-CYANO-PHENYLENE, DINITRO-BROMO-PHENYLENE, PHENYLAZO-PHENYLENE, ##STR3## R represents hydrogen, chlorine, lower alkyl, lower alkoxy, --O--CH.sub.2 --CN, --NH--CO--lower alkyl, --NH--COO lower alkyl or ##STR4## n stands for the integer 1 or 2, X represents cyano, --CO--NH.sub.2 or --COO-lower alkyl, R.sub.1 represents hydrogen, lower alkyl, lower alkylene-OH, lower alkylene-CN, lower alkylene-OCO-lower alkyl or lower alkenyl, and R.sub.Type: GrantFiled: April 6, 1978Date of Patent: July 10, 1979Assignee: Hoechst AktiengesellschaftInventors: Peter Mischke, Erwin Fleckenstein, Reinhard Mohr
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Patent number: 4061642Abstract: Compounds of the formula ##STR1## wherein X is aliphatic, cycloaliphatic, aromatic, aralkyl, hetaryl, hetarylalkyl or hydrogen; Y is aliphatic, aromatic, aralkyl, --COOR.sub.1, --COR.sub.2, ##STR2## --SO.sub.2 R.sub.2, ##STR3## --CN, --NH.sub.2, --NO, --NO.sub.2 or hydrogen with the proviso that when Y is hydrogen, X is other than hydrogen; Z.sub.1 is cyano, ##STR4## --NH--OR.sub.10, ##STR5## --OR.sub.12, --SR.sub.12 or --SO.sub.2 R.sub.12 and Z.sub.2 is chlorine, bromine, cyano, hydroxy, mercapto, --OR.sub.12, --SR.sub.12, --SO.sub.2 R.sub.12, ##STR6## --NH--OR.sub.10 or ##STR7## R.sub.1 is aliphatic; R.sub.2 is aliphatic, cycloaliphatic, aromatic, aralkyl or heterocyclic; R.sub.3 and R.sub.4 when taken separately are hydrogen, aliphatic, cycloaliphatic, aromatic or aralkyl; R.sub.3 and R.sub.4 when taken together with the nitrogen atom to which they are attached form a heterocyclic moiety; R.sub.5 and R.sub.6 when taken separately are aliphatic, aromatic, aralkyl, heterocyclic or hydrogen; R.sub.5 and R.Type: GrantFiled: May 19, 1976Date of Patent: December 6, 1977Assignee: Cassella Farbwerke Mainkur AGInventors: Erwin Fleckenstein, Ernst Heinrich, Reinhard Mohr
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Patent number: 4028321Abstract: A basic dyestuff of the formula ##STR1## wherein R.sub.1 is hydrogen, alkyl of 1 to 5 carbon atoms, hydroxyalkyl of 1 to 4 carbon atoms, cyanoalkyl of 1 to 4 carbon atoms in the alkyl moiety or chloroalkyl of 1 to 4 carbon atoms, R'.sub.2 is phenyl or naphthyl or is phenyl or naphthyl substituted by alkyl of 1 to 4 C-atoms and/or alkoxy of 1 to 4 carbon atoms or nitro or cyano and/or chlorine, R.sub.5 is an optionally substituted alkyl or aralkyl radical, R.sub.6 and R.sub.7 being the same or different, each is hydrogen or an alkyl radical or, both together, substituents which complete to form an anellated aromatic ring, Y is a bivalent atom or a bivalent group necessary to complete a 5- or 6-ring, R.sub.10 is hydrogen, fluorine, bromine or chlorine or alkyl of 1 to 4 C-atoms and X.sup..sup.Type: GrantFiled: July 23, 1974Date of Patent: June 7, 1977Assignee: Hoechst AktiengesellschaftInventors: Erwin Fleckenstein, Peter Mischke
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Patent number: 3980659Abstract: Compounds of the formula ##SPC1##Wherein X is aliphatic, cycloaliphatic, aromatic, aralkyl, hetaryl, hetarylalkyl or hydrogen; Y is aliphatic, aromatic, aralkyl, --COOR.sub.1, --COR.sub.2, ##EQU1## --SO.sub.2 R.sub.2, ##EQU2## --CN, --NH.sub.2, --NO, --NO.sub.2 or hydrogen with the proviso that when Y is hydrogen, X is other than hydrogen; Z.sub.1 is cyano, ##EQU3## --NH--OR.sub.10, ##EQU4## --OR.sub.12, --SR.sub.12 or --SO.sub.2 R.sub.12 and Z.sub.2 is chlorine, bromine, cyano, hydroxy, mercapto, --OR.sub.12, --SR.sub.12, --SO.sub.2 R.sub.12, ##EQU5## --NH--OR.sub.10 or ##EQU6## R.sub.1 is aliphatic; R.sub.2 is aliphatic, cycloaliphatic, aromatic, aralkyl or heterocyclic; R.sub.3 and R.sub.4 when taken separately are hydrogen, aliphatic, cycloaliphatic, aromatic or aralkyl; R.sub.3 and R.sub.4 when taken together with the nitrogen atom to which they are attached form a heterocyclic moiety; R.sub.5 and R.sub.6 when taken separately are aliphatic, aromatic, aralkyl, heterocyclic or hydrogen; R.sub.5 and R.sub.Type: GrantFiled: November 6, 1974Date of Patent: September 14, 1976Assignee: Cassella Farbwerke Mainkur AktiengesellschaftInventors: Erwin Fleckenstein, Ernst Heinrich, Reinhard Mohr
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Patent number: 3954782Abstract: Compounds of the formula ##SPC1##Wherein X is aliphatic, cycloaliphatic, aromatic, aralkyl, hetaryl, hetarylalkyl or hydrogen; Y is aliphatic, aromatic, aralkyl, --COOR.sub.1, --COR.sub.2, ##EQU1## --SO.sub.2 R.sub.2, ##EQU2## --CN, --NH.sub.2, --NO, --NO.sub.2 or hydrogen with the proviso that when Y is hydrogen, X is other than hydrogen; Z.sub.1 is cyano, ##EQU3## --NH--OR.sub.10, ##EQU4## --OR.sub.12, --SR.sub.12 or --SO.sub.2 R.sub.12 and Z.sub.2 is chlorine, bromine, cyano, hydroxy, mercapto, --OR.sub.12, --SR.sub.12, --SO.sub.2 R.sub.12, ##EQU5## --NH--OR.sub.10 or ##EQU6## R.sub.1 is aliphatic; R.sub.2 is aliphatic, cycloaliphatic, aromatic, aralkyl or heterocyclic; R.sub.3 and R.sub.4 when taken separately are hydrogen, aliphatic, cycloaliphatic, aromatic or aralkyl; R.sub.3 and R.sub.4 when taken together with the nitrogen atom to which they are attached form a heterocyclic moiety; R.sub.5 and R.sub.6 when taken separately are aliphatic, aromatic, aralkyl, heterocyclic or hydrogen; R.sub.5 and R.sub.Type: GrantFiled: November 6, 1974Date of Patent: May 4, 1976Assignee: Cassella Farbwerke Mainkur AktiengesellschaftInventors: Erwin Fleckenstein, Ernst Heinrich, Reinhard Mohr
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Patent number: 3947463Abstract: Compounds of the formulaWherein X is aliphatic, cycloaliphatic, aromatic, aralkyl, hetaryl, hetarylalkyl or hydrogen; Y is aliphatic, aromatic, aralkyl, --COOR.sub.1, --COR.sub.2, ##EQU1## --SO.sub.2 R.sub.2, ##EQU2## --CN, --NH.sub.2, --NO, --NO.sub.2 or hydrogen with the proviso that when Y is hydrogen, X is other than hydrogen; Z.sub.1 is cyano, ##EQU3## --NH--OR.sub.10, ##EQU4## --OR.sub.12, --SR.sub.12 or --SO.sub.2 R.sub.12 and Z.sub.2 is chlorine, bromine, cyano, hydroxy, mercapto, --OR.sub.12, --SR.sub.12, ##EQU5## --NH--OR.sub.10 or ##EQU6## R.sub.1 is aliphatic; R.sub.2 is aliphatic, cycloaliphatic, aromatic, aralkyl or heterocyclic; R.sub.1 and R.sub.4 when taken separately are hydrogen, aliphatic, cycloaliphatic, aromatic or aralkyl; R.sub.3 and R.sub.4 when taken together with the nitrogen atom to which they are attached form a heterocyclic moiety; R.sub.5 and R.sub.6 when taken separately are aliphatic, aromatic, aralkyl, heterocyclic or hydrogen; R.sub.5 and R.sub.Type: GrantFiled: November 6, 1974Date of Patent: March 30, 1976Assignee: Cassella Farbwerke Mainkur AGInventors: Erwin Fleckenstein, Ernst Heinrich, Reinhard Mohr
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Patent number: 3946024Abstract: Compounds of the formula ##SPC1##Wherein X is aliphatic, cycloaliphatic, aromatic, aralkyl, hetaryl, hetarylalkyl or hydrogen; Y is aliphatic, aromatic, aralkyl, --COOR.sub.1, --COR.sub.2, ##EQU1## --SO.sub.2 R.sub.2, ##EQU2## --CN, --NH.sub.2, --NO, --NO.sub.2 or hydrogen with the proviso that when Y is hydrogen, X is other than hydrogen; Z.sub.1 is cyano, ##EQU3## --NH--OR.sub.10, ##EQU4## --OR.sub.12, --SR.sub.12 or --SO.sub.2 R.sub.12 and Z.sub.2 is chlorine, bromine, cyano, hydroxy, mercapto, --OR.sub.12, --SR.sub.12, --SO.sub.2 R.sub.12, ##EQU5## --NH--OR.sub.10 or ##EQU6## R.sub.1 is aliphatic; R.sub.2 is aliphatic, cycloaliphatic, aromatic, aralkyl or heterocyclic; R.sub.3 and R.sub.4 when taken separately are hydrogen, aliphatic, cycloaliphatic, aromatic or aralkyl; R.sub.3 and R.sub.4 when taken together with the nitrogen atom to which they are attached form a heterocyclic moiety; R.sub.5 and R.sub.6 when taken separately are aliphatic, aromatic, aralkyl, heterocyclic or hydrogen; R.sub.5 and R.sub.Type: GrantFiled: March 31, 1975Date of Patent: March 23, 1976Assignee: Cassella Farbwerke Mainkur AGInventors: Erwin Fleckenstein, Ernst Heinrich, Reinhard Mohr
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Patent number: 3939142Abstract: Basic azo dyestuffs, free from sulfo groups and having the formulaWherein Z is the radical of a tertiary amino group or of a quaternary ammonium group, Alk is alkylene of two to five carbon atoms, X is oxygen, Ar is phenylene unsubstituted or substituted by alkyl of one to four carbon atoms, alkoxy of one to four carbon atoms and/or chlorine or bromine, and K as the radical of a coupling component is the radical of a tertiary amine of the benzene series, the radical of 2,6-diamino-3-cyano-4-methyl pyridine or a derivative thereof or the radical of the 2-hydroxynaphthalene series, which are suitable for the preparation of writing and stamping inks or pastes for ball-point pens as well as suitable in offset printing and for the dyeing, printing or mass dyeing of, for example, tannined cellulose fibers, silk, hair, leather, acetate silk, polyamide fibers or acid modified polyolefins, polyamide or polyester fibers and fibers containing polyacrylonitrile or polyvinylidene cyanide.Type: GrantFiled: August 6, 1974Date of Patent: February 17, 1976Assignee: Hoechst AktiengesellschaftInventor: Erwin Fleckenstein