Patents by Inventor Hans Gunter Otten
Hans Gunter Otten 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: 4773914Abstract: Dyestuffs which are highly suitable for use as the blue component in the trichromatic dyeing of polyamide fibre materials have the formula ##STR1## in which R.sub.1 and R.sub.2 denote alkyl, the total number of the C atoms in the radicals R.sub.1 and R.sub.2 being at least three.The dyeings obtained are distinguished, inter alia, by good ozone fastness and the absence of the catalytic fading effect.Type: GrantFiled: December 30, 1986Date of Patent: September 27, 1988Assignee: Bayer AktiengesellschaftInventors: Wolfgang Harms, Hans-Gunter Otten
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Patent number: 4773915Abstract: Azo dyestuffs of the formula ##STR1## wherein R.sub.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkoxyethoxy andX denotes acyl,are distinguished by good levelling properties and good allround fastness properties. They dye polyester fibres in a bright blue shade.Type: GrantFiled: January 7, 1987Date of Patent: September 27, 1988Assignee: Bayer AktiengesellschaftInventors: Winfried Kruckenberg, Klaus Leverenz, Hans-Gunter Otten
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Patent number: 4757137Abstract: Azo dyestuffs of the formula ##STR1## wherein R.sub.1 denotes acyl,R.sub.2 denotes hydrogen, fluorine, chlorine or trifluoromethyl,R.sub.3 denotes hydrogen, optionally substituted C.sub.1 -C.sub.4 -alkyl, cyclohexyl or optionally substituted phenyl andR.sub.4 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl groupare suitable for dyeing natural and synthetic fibre materials, for example for dyeing wool or polyamide fibres, in level read to violet shades with very good fastnesses to light, wet processing and perspiration, the color yield being good.Type: GrantFiled: September 22, 1983Date of Patent: July 12, 1988Assignee: Bayer AktiengesellschaftInventors: Gerhard Wolfrum, Erich Klauke, Hans-Gunter Otten
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Patent number: 4743269Abstract: Navy polyester dyeings which are produced by means of dyestuff mixtures based on azo dyestuffs from 2,4-dinitro-6-cyanoaniline and 3-acylamino-dialkylaminoanilines are distinguished by a very good wash fastness on using peroxide-containing domestic washing agents. Preferably the dyestuff formulations used contain a weakly acidic buffer system.Type: GrantFiled: December 16, 1986Date of Patent: May 10, 1988Assignee: Bayer AktiengesellschaftInventors: Wolfgang Haebler, Heinz Geiger, Hans-Gunter Otten, Horst Brandt
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Patent number: 4681932Abstract: Azo dyestuffs of the formula ##STR1## wherein R.sub.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkoxyethoxy andX denotes acyl,are distinguished by good levelling properties and good allround fastness properties. They dye polyester fibres in a bright blue shade.Type: GrantFiled: June 27, 1985Date of Patent: July 21, 1987Assignee: Bayer AktiengesellschaftInventors: Winfried Kruckenberg, Klaus Leverenz, Hans-Gunter Otten
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Patent number: 4539009Abstract: Mixtures of dyestuffs of the formula I ##STR1## and of the formula II ##STR2## wherein R=alkyl,R.sub.1 =H or R andR.sub.2 /R.sub.3 =R.sub.1 or alkoxy,are distinguished by being readily soluble in hard water and produce satisfactory golden yellow dyeings on polyamide fibres.Type: GrantFiled: November 2, 1984Date of Patent: September 3, 1985Assignee: Bayer AktiengesellschaftInventors: Horst Nickel, Hans-Gunter Otten
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Patent number: 4523926Abstract: Dyestuff mixtures of(a) an anthraquinone dyestuff of the formula ##STR1## (b) a preferably blue azo dyestuff of the formula ##STR2## wherein R.sub.1 =H or halogen,R.sub.2 =alkyl,R.sub.3 =H or alkoxy, andR.sub.4 and R.sub.5 =alkyl or alkenyl,and(c), optionally, shading dyestuffs are particularly inexpensive and are distinguished by good dyebath stability and application properties.Type: GrantFiled: August 13, 1984Date of Patent: June 18, 1985Assignee: Bayer AktiengesellschaftInventors: Horst Brandt, Gunter Gehrke, Rolf Muders, Hans-Gunter Otten, Dieter Wiegner
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Patent number: 4245995Abstract: Azo dyestuffs which contain, as the coupling component an indole of the formula ##STR1## wherein R denotes an optionally substituted alkyl radical, an optionally substituted aryl radical or an optionally substituted aralkyl radical, and the benzene ring A can be further substituted,frequently exhibit an undesired irreversible change in the color shade in acid solutions, which surprisingly can be prevented by adding nitrogen-containing complex-forming substances.Type: GrantFiled: February 9, 1978Date of Patent: January 20, 1981Assignee: Bayer AktiengesellschaftInventors: Herbert Hugl, Hans-Gunter Otten, Hans W. Petroll, Karlheinz Wolf
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Patent number: 4218373Abstract: A water-soluble monoazo dyestuff which, in the form of the free acid, corresponds to the formula ##STR1## wherein R.sub.1 denotes alkyl which can be mono-substituted by chlorine, hydroxyl, C.sub.1 to C.sub.4 alkoxy, cyano, phenyl or tolyl, cyclohexyl which can be optionally substituted by C.sub.1 -C.sub.4 alkyl, phenyl, C.sub.1 -C.sub.4 -alkyl phenyl, chlorophenyl, bromophenyl, trifluoromethylphenyl or naphthyl, alkenyl or benzenesulphonyl which can be substituted by fluorine, chlorine, bromine, trifluoromethyl, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,R.sub.2 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl which can be substituted by hydroxyl, cyano, formylamino, C.sub.1 -C.sub.4 alkylcarbonylamino or benzoylamino which in turn can be substituted by methyl, chlorine, bromine or trifluoromethyl; cyclohexyl or phenyl which can be substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 -alkoxy, chlorine, bromine or trifluoromethyl andR.sub.3 denotes hydrogen or C.sub.1 -C.sub.Type: GrantFiled: June 21, 1978Date of Patent: August 19, 1980Assignee: Bayer AktiengesellschaftInventors: Gerhard Wolfrum, Erich Klauke, Hans-Gunter Otten
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Patent number: 4146363Abstract: The dyestuff of the formula ##STR1## is suitable for dyeing synthetic polyamide textile materials, in particular for combination dyeings because of its favorable uptake properties.Type: GrantFiled: March 8, 1978Date of Patent: March 27, 1979Assignee: Bayer AktiengesellschaftInventors: Wolfgang Harms, Hans-Gunter Otten
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Patent number: 4119623Abstract: Dyestuffs, which in the form of the free acid of the formula ##STR1## wherein R.sub.1 denotes hydrogen, nitro, cyano, SO.sub.2 --R.sub.7, CONR.sub.8 R.sub.9, SO.sub.2 NR.sub.8 R.sub.9, SO.sub.2 OR.sub.10, COOR.sub.10, SO.sub.2 --NHSO.sub.2 --R.sub.11, sulpho or alkyl,R.sub.2 denotes hydrogen, nitro, halogen or optionally substituted alkyl, alkoxy or aryl,R.sub.3 denotes hydrogen, halogen, SO.sub.2 --R.sub.7, SO.sub.2 --NR.sub.8 R.sub.9 or optionally subsituted alkyl, alkoxy or aryl,R.sub.4 denotes hydrogen, halogen or optionally substituted alkyl, alkoxy or aryl,R.sub.5 denotes hydrogen or optionally substituted alkyl,R.sub.6 denotes alkylene,R.sub.7 denotes optionally substituted alkyl, aryl or aralkyl,R.sub.8 and R.sub.9 denote hydrogen, optionally substituted alkyl, cycloalkyl, aryl or aralkyl or the radical of a heterocyclic compound or, together with the N-atom, denote a heterocyclic structure,R.sub.10 denotes hydrogen or optionally substituted alkyl, aryl or aralkyl,R.sub.Type: GrantFiled: August 12, 1976Date of Patent: October 10, 1978Assignee: Bayer AktiengesellschaftInventors: Herbert Hugl, Hans-Gunter Otten, Richard Sommer, Gerhard Wolfrum
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Patent number: 4041024Abstract: Azo dyestuffs of formula ##STR1## wherein R.sub.1 denotes hydrogen, C.sub.1 --C.sub.4 alkyl, Cl, Br, --OCH.sub.3, --OC.sub.2 H.sub.5, --NO.sub.2, --CN, --SCN, --SO.sub.2 CH.sub.3, --SO.sub.2 C.sub.2 H.sub.5, --SO.sub.3 H, --SO.sub.2 NX.sub.2 (X=H or C.sub.m H.sub.2m.sub.+1 with m = 1-4) or --COOC.sub.n H.sub.2n.sub.+1 (n = 0-4);R.sub.2 represents hydrogen, CH.sub.3, C.sub.2 H.sub.5, --OCH.sub.3, --OC.sub.2 H.sub.5, Cl, Br, or the grouping --NHCOC.sub.n H.sub.2n.sub.+1 (n = 0-4);R.sub.3 denotes hydrogen, OCH.sub.3, OC.sub.2 H.sub.5, CH.sub.3 or C.sub.2 H.sub.5 ;R.sub.4 represents C.sub.n H.sub.2n.sub.+1 (n = o-4), or CH.sub.2 CH.sub.2 SO.sub.3 H;R.sub.5 represents hydrogen or a sulphonic acid group, and p is 1 or 2,With only one of the residues R.sub.1, R.sub.4 and R.sub.5 representing or containing a sulphonic acid group. The dyestuffs are suitable for dyeing nitrogen-containing materials especially for dyeing synthetic polyamide and polyurethane fibers.Type: GrantFiled: October 3, 1972Date of Patent: August 9, 1977Assignee: Bayer AktiengesellschaftInventors: Gerhard Wolfrum, Hans-Gunter Otten
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Patent number: 4000123Abstract: Monoazo dyestuffs which in the form of the free acid correspond to the general formula ##STR1## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 have the meaning given in the description and their use for the dyeing of natural and synthetic fibre materials, especially for dyeing polyamide fibres. Dyeings obtained distinguish themselves by very good fastness to light. Dyestuffs are absorbed well on polyamide fibres already in a neutral to weakly acid dye bath. By polyamide fibres there are here especially understood those from synthetic polyamides such as .EPSILON.-polycaprolactam, or condensation products of adipic acid and hexamethylenediamine.Type: GrantFiled: February 3, 1975Date of Patent: December 28, 1976Assignee: Bayer AktiengesellschaftInventors: Richard Sommer, Gerhard Wolfrum, Hans Gunter Otten