Stefan Gerstung

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Reinheim/FRG, DE

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Patents Grantslast 30 patents

Information Patent Grant
Oxidation hair dye compositions containing 3,4,5-triaminopyrazole d...
- Patent number 5,766,576
- Issue date Jun 16, 1998
- Wella Aktiengesellschaft
- Isolde Lowe
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Oxidation hair dye composition based on 4,5-diaminopyrazole and m-p...
- Patent number 5,718,731
- Issue date Feb 17, 1998
- Wella Aktiengesellschaft
- Isolde Loewe
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Process for the synthesis of 4,5-diaminopyrazole derivatives useful...
- Patent number 5,663,366
- Issue date Sep 2, 1997
- Wella Aktiengesellschat
- Hans Neunhoeffer
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Composition for the oxidative dyeing of hair containing 4,5-diamino...
- Patent number 5,534,267
- Issue date Jul 9, 1996
- Wella Aktiengesellschaft
- Hans Neunhoeffer
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
N-phenylaminopyrazole derivatives as well as composition and proces...
- Patent number 5,430,159
- Issue date Jul 4, 1995
- Wella Aktiengesellschaft
- Hans Neunhoeffer
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Hair dye containing aminopyrazole derivatives as well as pyrazole d...
- Patent number 5,380,340
- Issue date Jan 10, 1995
- Wella Aktiengesellschaft
- Hans Neunhoeffer
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE