Inventor

NEUNHOEFFER HANS

DE7 patents

⚠️ This page may combine multiple inventors who share the name “NEUNHOEFFER HANS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WELLA AG

4 patents

US5534267AJul 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

US5061289AOct 29, 1991

Oxidation hair dye composition containinng diaminopyrazol derivatives and new diaminopyrazol derivatives

WELLA AG646 citations97

US5430159AJul 4, 1995

N-phenylaminopyrazole derivatives as well as composition and process for the dyeing of hair

WELLA AG30 citations92

MERCK PATENT GMBH

2 patents

US7863478B2Jan 4, 2011

UV filters

MERCK PATENT GMBH5 citations59

US7101537B2Sep 5, 2006

Tricyclic quinoxaline and quinoline derivatives as a UV filter

MERCK PATENT GMBH0 citations40

WELLA AKTIENGESELLSCHAT

1 patent

US5663366ASep 2, 1997

Process for the synthesis of 4,5-diaminopyrazole derivatives useful for dyeing hair

WELLA AKTIENGESELLSCHAT460 citations97