Patents by Inventor Gerhard Back
Gerhard Back 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: 4582896Abstract: Dyes of the formula ##STR1## in which Me is cobalt or chromium, A is a diazo component of a benzene or naphthalene which carries a hydroxyl or carboxyl group in the o-position relative to the azo group, B is an o-aminonaphthol, R and R' independently of each other are each benzene or naphthalene which can carry further substituents, but no arylamino radicals, no sulfo groups and no metallizable groups, in the o-position relative to the azo group, Ka is a cation, p is 0 or 1, m and n independently of each other are each such a number from 0 to 1 that the total n+m is a number from 1 to 2, and q is an integer from 1 to 6 are particularly suitable for dyeing wool or polyamide and especially leather in shades of deep brown, grey and black.These dyes exhibit good affinity, good acid and alkali stability, and good fastness.Type: GrantFiled: June 13, 1983Date of Patent: April 15, 1986Assignee: Ciba-Geigy CorporationInventor: Gerhard Back
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Patent number: 4502865Abstract: Novel chromium complex dyes are disclosed which have the formula ##STR1## wherein S.sub.1 represents a hydrogen or halogen atom, a nitro group, a sulpho group, an alkyl or alkoxy radical, an acylamino or arylazo group,S.sub.2 represents a hydrogen or halogen atom, a nitro group, a sulpho group, an alkyl or alkoxy radical,S.sub.3 represents a hydrogen atom, a nitro group or a halogen atom,P is 1 or 2,R represents a fluorochloropyrimidyl or fluorotriazinyl radical, a chloroacetyl, bromoacetyl, .alpha.-chloro- or .alpha.-bromoacryloyl radical or an .alpha.,.beta.-dichloro- or .alpha.,.beta.-dibromopropionyl radical, andK.sup..sym. represents a cation.Type: GrantFiled: December 2, 1983Date of Patent: March 5, 1985Assignee: Ciba-Geigy CorporationInventors: Gerhard Back, Fabio Beffa, Hans-Ulrich Sch/u/ tz
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Patent number: 4502860Abstract: Dyes of the formula I ##STR1## in which A, B, C, D, E, F, Z, Z', X, X', n, n.sub.1, n.sub.2 and n.sub.3, p and Ka.sup..sym. are as defined in claim 1, are particularly suitable for dyeing wool or polyamide and especially leather.Type: GrantFiled: June 20, 1983Date of Patent: March 5, 1985Assignee: Ciba-Geigy CorporationInventor: Gerhard Back
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Patent number: 4432898Abstract: Chromium complex dyes are disclosed which have the formula ##STR1## wherein S.sub.1 represents a hydrogen or halogen atom, a nitro group, a sulpho group, an alkyl or alkoxy radical, an acylamino or arylazo group,S.sub.2 represents a hydrogen or halogen atom, a nitro group, a sulpho group, an alkyl or alkoxy radical,S.sub.3 represents a hydrogen atom, a nitro group or a halogen atom,P is 1 or 2,R represents a fluorochloropyrimidyl or fluorotriazinyl radical, a chloroacetyl, bromoacetyl, .alpha.-chloro- or .alpha.-bromoacryloyl radical or an .alpha.,.beta.-dichloro- or .alpha., .beta.-dibromopropionyl radical, andM.sup..sym. represents a cation.Type: GrantFiled: October 23, 1980Date of Patent: February 21, 1984Assignee: Ciba-Geigy CorporationInventors: Gerhard Back, Fabio Beffa, Hans-Ulrich Schutz
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Patent number: 4431583Abstract: 1:2 Cobalt complex dyes of azo compounds of the formula ##STR1## wherein D is a phenyl or naphthyl radical which is substituted by sulphonic acid groups, halogen atoms, alkyl, alkoxy, nitro, cyano, acylamino or arylazo groups or is unsubstituted, and R is a hydrogen atom, a sulpho group, a halogen atom or a methyl group, and wherein the total number of sulpho groups present is 1 to 3. The dyes are suitable for dyeing polyamide materials such as wool, silk, synthetic polyamides and leather, particularly the latter. The dyes give full brown shades of good covering power with excellent fastness to light.Type: GrantFiled: September 4, 1980Date of Patent: February 14, 1984Assignee: Ciba-Geigy CorporationInventor: Gerhard Back
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Patent number: 4364864Abstract: Cobalt and chromium complex dyes which contain, bonded to a metal atom, one molecule of each of the azo compounds of the formula ##STR1## wherein R is methyl or ethyl and the phenyl ring a is unsubstituted or substituted by 1 to 2 chlorine atoms, nd mixtures thereof with the symmetrical 1:2 cobalt or chromium complex dyes of the azo compounds of the formulae (1) and (2), said dyes being useful in the dyeing and printing of a variety of materials, especially nitrogen containing materials such as silk, leather, polyamides, polyurethanes and especially wool to obtain level dyes having good fastness to light, washing, water, hot water, fulling, decatizing and carbonizing.Type: GrantFiled: March 6, 1979Date of Patent: December 21, 1982Assignee: Ciba-Geigy CorporationInventors: Fabio Beffa, Gerhard Back, Hans U. Schutz
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Patent number: 4331596Abstract: 1:2 Chromium complex dyes of the formula ##STR1## wherein A is the radical of a diazo component of the benzene or naphthalene class which carries the complex forming group X in ortho-position to the azo group, B is the radical of a coupling component which couples in ortho-position to the oxy group, D is the radical of an amine of the benzene or naphthalene class which carries the complex-forming group in ortho-position to the azo group, X is an oxygen atom or a --CO--O-- group, Ar is an aromatic carbocyclic radical. Ar' and A" are aromatic carbocyclic or heterocyclic radicals, q is an integer from 0 to 5, n is an integer from 1 to 3, m is an integer from 0 to 2 and p is 0 or 1, but the sum of n+m may be at most 3, and wherein the benzene ring can carry a further fused benzene ring or can be substituted by halogen, nitro, alkyl or alkoxy, and K.sup.+ is a cation.Type: GrantFiled: December 11, 1979Date of Patent: May 25, 1982Assignee: Ciba-Geigy CorporationInventors: Fabio Beffa, Gerhard Back
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Patent number: 4193916Abstract: A heavy metal complex of an azo compound of the formula ##STR1## in which A is a substituted or unsubstituted carboxy- or sulpho-phenyl radical or a carboxy- or sulpho- naphthyl radical, p is 1 or 2, R.sub.1 is hydrogen, chlorine, bromine, nitro, alkyl, alkoxy, aryloxy or acylamino, R.sub.2 is hydrogen or alkyl, R.sub.3 is hydroxyl or amino, R.sub.4 is hydrogen, chlorine, bromine, cyano, amino, amino substituted by 1 or 2 alkyl radicals, arylamino, morpholino, pyrrolidino, piperidino, mercapto, alkylthio, arylthio, sulpho or arylsulphonyl and R.sub.5 is hydrogen, chlorine or bromine and one of the radicals R.sub.1 and --SO.sub.2 --NR.sub.2 --A is bonded to the benzene ring in the 4-position and the other is bonded to the benzene ring in the 5-position or 6-position, and 1 or 2 molecules of the azo compound of the formula (1) are bonded to one atom of copper, nickel, chromium or cobalt; such dyes being suitable for dyeing and printing polyamide materials, such as wool, silk, leather and synthetic polyamides.Type: GrantFiled: September 28, 1977Date of Patent: March 18, 1980Assignee: Ciba-Geigy CorporationInventors: Gerhard Back, Alfred Fasciati
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Patent number: 4171300Abstract: A process for the manufacture of metal complex dyes, wherein a metallisable dye is reacted with a metal compound in a solvent and in the presence of a hydroxycarboxylate.Type: GrantFiled: April 3, 1978Date of Patent: October 16, 1979Assignee: Ciba-Geigy AGInventors: Peter Donath, Gerhard Back
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Patent number: 4141890Abstract: Azo compounds of the formula ##STR1## wherein R is hydrogen, an alkyl or aryl radical and D is the radical of a diazo component are valuable dyestuffs for coloring textile materials.Type: GrantFiled: October 29, 1976Date of Patent: February 27, 1979Assignee: Ciba-Geigy CorporationInventors: Gert Hegar, Gerhard Back
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Patent number: 4116952Abstract: 1:2 Chromium complex dyes which contain one molecule of an azo or azomethine compound of the formula ##STR1## and one molecule of the azomethine compound of the formula ##STR2## COMPLEXED TO A CHROMIUM ATOM, IN WHICH FORMULAE A represents the radical of a diazo component of the benzene or naphthalene series, which carries the complex-forming group XH in ortho-position to the azo group,B represents the radical of a coupling component which couples in ortho-position to HX' or the radical of an aromatic o-hydroxyaldehyde,Z represents a nitrogen atom or the -CH group,X represents an oxygen atom or a -CO-O group,X' represents an oxygen atom, a NH group, a low molecular N-alkyl, N-aralkyl or N-aryl group, andR represents a substituted or unsubstituted aliphatic or cycloaliphatic radical,And the benzene ring a can carry a further fused benzene ring or can be substituted by halogen, nitro, alkyl and alkoxy, in particular by low molecular alkyl and alkoxy, and these compounds contain together 0 to 5 water-solubilizingType: GrantFiled: April 18, 1977Date of Patent: September 26, 1978Assignee: Ciba-Geigy CorporationInventors: Fabio Beffa, Gerhard Back, Eginhard Steiner
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Patent number: 4105400Abstract: The present invention relates to a process for dyeing or printing natural protein fibres in deep, black, brown, and navy blue shades, wherein protein fibres are dyed from an aqueous liquor, in the presence of a levelling agent, with a metal complex of the formula ##STR1## wherein R.sub.1 represents hydrogen, an alkyl, aralkyl or aryl radical, R.sub.2 represents an acryloyl, acetyl or a propionyl radical which is substituted by one or two halogen atoms, Me represents a chromium-III or cobalt-III ion and X represents hydrogen, nitro, chlorine, methyl, methoxy, acetylamino, chloroacetylamino or propionylamino, or the dyestuff is transferred from a support by transfer printing.Type: GrantFiled: March 29, 1976Date of Patent: August 8, 1978Assignee: Ciba-Geigy CorporationInventor: Gerhard Back
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Patent number: 4085097Abstract: A process is described for the manufacture of chromium complexes of metallizable dyes in the form of solid dyestuff powders of low salt to salt-free content, or of concentrated solutions of low salt or salt-free content in which a metallizable dye, or a mixture of metallizable dyes, in an organic solvent which is immiscible or sparingly miscible with water, or reacted with a chromium compound, in the course of which any water which is liberated is removed by azeotropic distillation, and the resulting chromium complex, provided it is a 1:1 complex, is then optionally reacted in the presence of a base with a further mol of a metallizable dye, or of a colorless, complexforming compound, then isolated from undissolved constituents, and the resulting dye solution of low salt or salt-free content is optionally concentrated or evaporated to dryness, whereby it is possible the manufacture of 1:1 or 1:2 chromium complexes without the handicap of effluent pollution, and to isolate the dyes without using salt.Type: GrantFiled: January 7, 1976Date of Patent: April 18, 1978Assignee: Ciba-Geigy AGInventors: Fabio Beffa, Arthur Buhler, Peter Donath, Hans Ulrich Schutz, Gerhard Back
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Patent number: 4083839Abstract: Chromium complex dyes of the formula ##STR1## wherein Z is a nitro group or a chlorine atom, each of R and R.sub.1 is a phenyl radical which is optionally substituted by halogen, low molecular alkoxy, low molecular alkyl or nitro, one of the symbols X.sub.1, X.sub.2 and X.sub.3 is hydrogen and each of the others is hydrogen, a halogen atom, a nitro, methyl or methoxy group and Me.sup.+ is a cation. The dyes are suitable for dyeing and printing natural and synthetic polyamides to produce dyeings which are level and have good fastness to light, washing, fulling, decatizing and carbonizing.Type: GrantFiled: August 6, 1976Date of Patent: April 11, 1978Assignee: Ciba-Geigy CorporationInventors: Gerhard Back, Fabio Beffa
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Patent number: 4053462Abstract: Chromium complex dyes which, in the form of their free acid, have the formula ##STR1## wherein one X represents the sulphonic acid group and the other X represents the nitro group, Y is a sulfone or sulfonamide group and Z is an acyl group. The dyes are suitable for dyeing natural and synthetic polyamides to produce dyeings which are level and have good fastness to light, perspiration, fulling, decatizing and carbonizing.Type: GrantFiled: August 4, 1976Date of Patent: October 11, 1977Assignee: Ciba-Geigy CorporationInventors: Fabio Beffa, Gerhard Back
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Patent number: 4033716Abstract: A process for dyeing and printing hydrophilic fibrous material by the transfer printing process using carriers that are treated with at least one transferable, metallizable dye or color former and optionally a binder that is stable below 230.degree. C, which comprises impregnating the material to be dyed or printed with a solution which containsA. at least one organic solvent with a boiling point higher than 100.degree. C andB. at least one compound that yields complex forming metals, drying the impregnated material and bringing it into contact with the treated carrier, then subjecting both material and carrier to a heat treatment, and subsequently providing the resultant print with an aftertreatment.Type: GrantFiled: October 15, 1974Date of Patent: July 5, 1977Assignee: Ciba-Geigy AGInventors: Raymond Defago, Visvanathan Ramanathan, Gerhard Back
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Patent number: 4033942Abstract: 1:2 Chromium complex dyes of an azo compound of the formula ##STR1## and an azomethine compound of the formula ##STR2## COMPLEXED TO A CHROMIUM ATOM, WHEREIN A is an ortho-phenylene or -- naphthylene diazo component radical; B is an ortho-phenylene or -- naphthylene coupling component radical; X is --O-- or --CO--O--; X' is --O--, --NH--, --N(lower alkyl)--, --N(aralkyl)-- or --N(aryl)--; R is an aliphatic radical; the benzene ring "a" is unsubstituted or substituted by a fused benzene ring, halo, nitro alkyl or alkoxy; the molecule containing 0-5 water solubilizing groups and optionally a group of the formula --N=N--Ar--N=N--Ar' and/or -N=N--Ar" wherein Ar, Ar' and Ar" represent an aromatic or carbocyclic radical.Type: GrantFiled: April 27, 1976Date of Patent: July 5, 1977Assignee: Ciba-Geigy AGInventors: Fabio Beffa, Gerhard Back, Eginhard Steiner
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Patent number: 4013630Abstract: Chromium complex dyes of the formula ##STR1## WHEREIN Z represents a phenyl radical, an alkyl radical of 4 to 12 carbon atoms, a cycloalkyl radical of 5 to 9 carbon atoms or an aralkyl radical of 7 to 12 carbon atoms,S.sub.1 represents hydrogen, halogen, alkyl of 1 to 5 carbon atoms, alkoxy of 1 to 2 carbon atoms, nitro, alkanoylamino of 2 to 3 carbon atoms or alkoxycarbonylamino of 2 to 3 carbon atoms,S.sub.2 represents hydrogen, alkyl of 1 to 5 carbon atoms, alkanoylamino or alkoxycarbonylamino, each of 2 to 3 carbon atoms,Me.sup.+ represents a cation, andAr represents the radical of an aromatic or a heterocyclic diazo component which contains 1 to 3 SO.sub.3 H groups and is optionally further substituted by carboxy, halogen, alkyl of 1 to 5 carbon atoms, alkoxy of 1 to 2 carbon atoms or nitro.Type: GrantFiled: March 2, 1976Date of Patent: March 22, 1977Assignee: Ciba-Geigy CorporationInventors: Fabio Beffa, Gerhard Back
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Patent number: 4005065Abstract: Chromium complex dyes which, in the form of their free acid, have the formula ##STR1## wherein one X represents the sulphonic acid group and the other X represents the nitro group, Y is a sulfone or sulfonamide group and Z is an acyl group. The dyes are suitable for dyeing natural and synthetic polyamides to produce dyeings which are level and have good fastness to light, perspiration, fulling, decatizing and carbonizing.Type: GrantFiled: June 17, 1974Date of Patent: January 25, 1977Assignee: Ciba-Geigy CorporationInventors: Fabio Beffa, Gerhard Back
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Patent number: RE29585Abstract: The heavy metal complexes of azo dyestuffs of formula ##STR1## where B is hydrogen, chloro or bromo and D is the residue of a diazo component of the benzene or naphthalene series that contains an hydroxyl, carboxyl or amino group in the position ortho to the azo group, are useful to dye substrates, notably wool, in level green and blue shades having good resistance to acid, alkali, light and rubbing.Type: GrantFiled: March 8, 1977Date of Patent: March 21, 1978Assignee: Ciba-Geigy CorporationInventors: Gerhard Back, Arthur Buehler