Inventor
GERSTUNG STEFAN
DE6 patents
⚠️ This page may combine multiple inventors who share the name “GERSTUNG STEFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WELLA AG
5 patentsUS5534267AJul 9, 1996
Composition for the oxidative dyeing of hair containing 4,5-diaminopyrazole derivatives as well as new 4,5-diaminopyrazole derivatives and process for their synthesis
WELLA AG498 citations98
US5380340AJan 10, 1995
Hair dye containing aminopyrazole derivatives as well as pyrazole derivatives
WELLA AG596 citations98
US5766576AJun 16, 1998
Oxidation hair dye compositions containing 3,4,5-triaminopyrazole derivatives and 3,4,5-triaminopyrazole derivatives
WELLA AG566 citations97
US5718731AFeb 17, 1998
Oxidation hair dye composition based on 4,5-diaminopyrazole and m-phenylenediamine derivatives
WELLA AG59 citations94
US5430159AJul 4, 1995
N-phenylaminopyrazole derivatives as well as composition and process for the dyeing of hair
WELLA AG30 citations92