Inventor
BRACK ALFRED
27 patents
Patents
27 patentsUS3971807AJul 27, 1976
Cationic dyestuffs
BAYER AG57 citations92
US4695633ASep 22, 1987
Chromogenic 4,4-diaryl-dihydroquinazolones, their preparation and their use
BAYER AG16 citations74
US4754034AJun 28, 1988
Chromogenic 4,4-diaryldihydroquinazolones
BAYER AG7 citations73
US3959310AMay 25, 1976
Cationic dyestuffs
BAYER AG10 citations71
US4968797ANov 6, 1990
Chromogenic 4,4-diaryldihydroquinazolones
BAYER AG2 citations62
US4446326AMay 1, 1984
Cationic naphtholactam dyestuffs
BAYER AG2 citations62
US4234488ANov 18, 1980
Benz-[c,d]-indolyl compounds
BAYER AG4 citations62
US4220780ASep 2, 1980
Cationic dyestuffs
BAYER AG3 citations62
US4147865AApr 3, 1979
Benz-(C,D)-indolyl compounds
BAYER AG2 citations62
US4080331AMar 21, 1978
Transfer printing process
BAYER AG2 citations62
US4022799AMay 10, 1977
Naphtholactam dyestuffs
BAYER AG2 citations62
US4001253AJan 4, 1977
Naphtholactam dyestuffs
BAYER AG2 citations62
US3992405ANov 16, 1976
Cationic dyestuffs
BAYER AG4 citations62
US3980651ASep 14, 1976
Water-insoluble barbituric acid-substituted naphthalactam dyestuff
BAYER AG3 citations62
US3975150AAug 17, 1976
Transfer printing process
BAYER AG2 citations62
US5578711ANov 26, 1996
Process for the preparation of dyestuffs
BAYER AG3 citations61
US5328993AJul 12, 1994
Cationic triazatrimethine dyestuffs
BAYER AG2 citations61
US4017484AApr 12, 1977
Cationic dyestuffs
BAYER AG0 citations52
US4000130ADec 28, 1976
Cationic dyestuffs
BAYER AG1 citations52
US4840641AJun 20, 1989
Cationic diazacyanine dyestuffs for dyeing polyacrylonitrile-wool blends
BAYER AG0 citations51
US4396768AAug 2, 1983
Process for the preparation of anionic quinophthalone dyestuffs
BAYER AG0 citations51
US4283540AAug 11, 1981
Process for the preparation of cationic naphtholactam dyestuffs
BAYER AG1 citations51
US4203722AMay 20, 1980
Transfer printing process with naphtholactam dyes
BAYER AG1 citations51
US5541299AJul 30, 1996
Process for the preparation of dyestuffs
BAYER AG1 citations50
US5502171AMar 26, 1996
Process for the preparation of dyestuffs
BAYER AG1 citations50
US4310664AJan 12, 1982
Process for the preparation of pyridine-4-aldehyde phenylhydrazones
BAYER AG0 citations50
US3950347AApr 13, 1976
Naphtholactam dyestuffs
BAYER AG0 citations41