Inventor
KONRAD GUENTHER
DE7 patents
Patents
7 patentsUS4994087AFeb 19, 1991
Compounds containing substituted phenylamino and pyridyl groups and hair dyeing preparations using them
HENKEL KGAA18 citations81
US4314809AFeb 9, 1982
Novel coupler components for oxidation hair dyes, the manufacture thereof, and hair colorants
HENKEL KGAA18 citations81
US6719811B1Apr 13, 2004
Oxidation colorants for keratin fibers
HENKEL KGAA10 citations72
US4322212AMar 30, 1982
Oxidation hair dyes comprising substituted benzotriazoles
HENKEL KGAA15 citations72
US4828568AMay 9, 1989
Oxidation hair-dyeing preparations
HENKEL KGAA6 citations62
US4684371AAug 4, 1987
Oxidation hair dyes comprising m-phenylenediamine derivatives as coupling components
HENKEL KGAA2 citations62
US4463006AJul 31, 1984
Diglycidyl-pteridine compounds
HENKEL KGAA1 citations51