Inventor
LEVERENZ KLAUS
DE18 patents
Patents
18 patentsUS4105655AAug 8, 1978
Phenyl-azo-anilino dyestuff
BAYER AG17 citations80
US3962209AJun 8, 1976
Process for preparing azo dyestuffs with ortho-azo cyano groups by cyano exchange of metal cyanides and halo dyestuffs
BAYER AG21 citations75
US5208325AMay 4, 1993
Cationic 1,3,4-thiadiazole dyestuffs
BAYER AG15 citations74
US4810783AMar 7, 1989
Process for the preparation of azo dyestuffs having an aniline-type coupler by aminolysis of the appropriate ether group-containing compounds
BAYER AG9 citations73
US4722737AFeb 2, 1988
Stable gamma-modification of a benzisothiazole azo dyestuff
BAYER AG8 citations73
US4083846AApr 11, 1978
Process for the preparation of azo dyestuffs
BAYER AG7 citations73
US3968099AJul 6, 1976
Process for the preparation of azo dyestuffs containing cyano groups
BAYER AG7 citations73
US3954395AMay 4, 1976
Mixtures of dyestuffs
BAYER AG8 citations73
US4681932AJul 21, 1987
Benzoisothiazole azo dyestuffs
BAYER AG10 citations72
US4329283AMay 11, 1982
Hydroxypyridone azo dyestuffs
BAYER AG7 citations71
US4237048ADec 2, 1980
Monoazo dyestuff containing di-cyano substituents ortho to the azo group
BAYER AG10 citations71
US4083844AApr 11, 1978
Phenylazo orthocyano phenylazo or orthocyano phenylazo phenylazo containing dyestuffs
BAYER AG15 citations71
US3978040AAug 31, 1976
Process for the preparation of cyanoazo compounds by reacting halogenoazo compounds with CuCN in an aqueous media in the presence of a nitrogen base
BAYER AG10 citations71
US4424156AJan 3, 1984
Halo-substituted amino-and substituted-sulphonamido-containing azo dyestuffs
BAYER AG2 citations62
US4250089AFeb 10, 1981
Process for diazotizing aromatic amines
BAYER AG4 citations62
US5102994AApr 7, 1992
Disperse azo dyestuffs containing a thiocyonate group
BAYER AG0 citations52
US4835261AMay 30, 1989
Nonionic azo compounds in which the coupling component is a 3,4-dialkoxy aniline derivative
BAYER AG1 citations51
US4773915ASep 27, 1988
Benzisothiazole azo dye for synthetic fibers
BAYER AG0 citations51