Inventor
WOLFRUM GERHARD
DE47 patents
⚠️ This page may combine multiple inventors who share the name “WOLFRUM GERHARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
38 patentsUS4132840AJan 2, 1979
Process for coloring polyurethane foams
BAYER AG53 citations96
US4038240AJul 26, 1977
Process for dyeing polyurethane resins
BAYER AG29 citations82
US4988616AJan 29, 1991
Method for detecting hydrogen peroxide employing triaryl- and trihetarylmethane derivatives as redox indicators
BAYER AG19 citations73
US4041024AAug 9, 1977
Sulfo containing monoazo dyestuffs containing a benzthiazole diazo moiety and an N-benzylamino anilino coupling component
BAYER AG12 citations72
US4124581ANov 7, 1978
Disazo dyestuffs containing a thiazole central component
BAYER AG16 citations69
US4180503ADec 25, 1979
Acid disazo dyestuffs containing a substituted thiophene middle component
BAYER AG15 citations67
US4749813AJun 7, 1988
4-alkyl-2-trifluoromethylanilines
BAYER AG3 citations63
US4248774AFeb 3, 1981
P-Sulphophenoxy-phenylazo indoles
BAYER AG4 citations63
US4247460AJan 27, 1981
Disazo dyestuff sulphuric acid ester
BAYER AG5 citations63
US4757137AJul 12, 1988
Orthotrifluoromethyl containing phenylazonaphthol dyestuffs
BAYER AG3 citations62
US4711954ADec 8, 1987
3-thienylazo dyes with a gamma-acid coupler
BAYER AG6 citations62
US4243584AJan 6, 1981
Monoazo dyestuffs containing diazo component substituted by disulfimide and trifluoromethyl groups
BAYER AG2 citations62
US4088651AMay 9, 1978
Acylamino quinophthalone compounds
BAYER AG4 citations62
US4439372AMar 27, 1984
Process for the preparation of styryl dyestuffs
BAYER AG3 citations61
US4218373AAug 19, 1980
Water-soluble phenylazoaminonaphthol sulphonic acid dyestuffs
BAYER AG6 citations61
US4159265AJun 26, 1979
Phenylazopyrazolo dyestuffs including disulfimide substituent
BAYER AG2 citations61
US4119623AOct 10, 1978
Water-soluble diphenylamine-azo-sulfatoalkoxyphenyl dyestuffs
BAYER AG6 citations61
US4000123ADec 28, 1976
Aminosulfonylphenyl-azo-indolyl dyestuffs
BAYER AG5 citations61
US3994873ANov 30, 1976
Azo dyestuffs containing sulfonylamino-sulfonyl groups
BAYER AG3 citations61
US3956267AMay 11, 1976
Indole-containing disazo dyestuffs having a sulfatoalkyleneoxy-substituent
BAYER AG4 citations61
US4179436ADec 18, 1979
Monoazodyestuffs containing diphenamine and phenoxy components
BAYER AG2 citations60
US4163013AJul 31, 1979
Diphenylamine-azo-hydrocarbylsulfonylphenyl dyestuffs
BAYER AG3 citations60
US4060521ANov 29, 1977
Benzene-azo-indole dyestuffs
BAYER AG2 citations59
US4249275AFeb 10, 1981
Process for dyeing and printing cellulose fibres
BAYER AG5 citations57
US4231748ANov 4, 1980
Azo dyestuffs
BAYER AG0 citations52
US4024126AMay 17, 1977
Aryl- or alkyl-sulphonyl aminosulphonylphenyl-azo-arylene-azo-phenyl dyestuffs
BAYER AG1 citations52
US4008216AFeb 15, 1977
Benzenesulphonylbenzenesulphonamideazophenyl-or-naphthyl-azolhydroxyloweralkoxyphenyl dyestuffs
BAYER AG1 citations52
US3971770AJul 27, 1976
Disulfimide disazo dyestuffs
BAYER AG0 citations52
US3945992AMar 23, 1976
Arylsulphonylaminosulphonylphenyl-azo-arylene-azo-phenyl dyestuff
BAYER AG1 citations52
US4059402ANov 22, 1977
Transfer printing process
BAYER AG1 citations51
US4022763AMay 10, 1977
Sulfaphenyl-azo-phenyl-azo-aminophenyl dyestuffs
BAYER AG1 citations51
US4339380AJul 13, 1982
Azo dyestuffs
BAYER AG1 citations50
US4113428ASep 12, 1978
Process for dyeing fibre materials
BAYER AG1 citations50
US4013631AMar 22, 1977
Monoazo dyestuffs containing an N-β-1,2,3-triazolylethyl anilino coupling component
BAYER AG1 citations49
US4324723AApr 13, 1982
Monoazo dyestuffs
BAYER AG1 citations48
US4324722AApr 13, 1982
Water-soluble substituted aminocarbonyl monoazo dyestuffs
BAYER AG1 citations48
US4369324AJan 18, 1983
Process for the preparation of 2-amino-6-nitrobenzothiazole
BAYER AG1 citations47
US3978039AAug 24, 1976
Disulphimidophenyl-azo-naphthyl-azo-aminophenyl dyestuffs
BAYER AG0 citations41
AGFA GEVAERT AG
5 patentsUS4396710AAug 2, 1983
Photographic recording material with metal complexable, heterocyclic azo dye
AGFA GEVAERT AG41 citations92
US4521506AJun 4, 1985
Monoazo pyridinol dyes chelated or capable of being chelated with metal ions and their use for image production
AGFA GEVAERT AG18 citations73
US4600681AJul 15, 1986
Color photographic material with azo dicyanoimidazole dyes
AGFA GEVAERT AG15 citations72
US4418143ANov 29, 1983
Color photographic recording material
AGFA GEVAERT AG6 citations62
US4393132AJul 12, 1983
Photographic recording material with arylazocyanoacetic ester dye releasers
AGFA GEVAERT AG2 citations62