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Erwin Weinrich
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Haan, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Two-component peroxide hair bleaching compositions
Patent number
4,226,852
Issue date
Oct 7, 1980
Henkel Kommanditgesellschaft auf Aktien
Holger Tesmann
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Oxidation hair dyes based upon tetraaminopyrimidine developers and...
Patent number
4,213,758
Issue date
Jul 22, 1980
Henkel Kommanditgesellschaft auf Aktien
David Rose
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Guanidine accelerators for peroxide hair bleaching compositions
Patent number
4,186,186
Issue date
Jan 29, 1980
Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
Holger Tesmann
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Oxidation hair dyes based upon tetraaminopyrimidine developers
Patent number
RE30199
Issue date
Jan 29, 1980
Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
David Rose
008 - Bleaching and dyeing
Information
Patent Grant
Hair dye compositions containing 3,5-diamino-2-substituted-alkylben...
Patent number
4,171,203
Issue date
Oct 16, 1979
Henkel Kommanditgesellschaft auf Aktien
David Rose
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Agents for reducing the damage to hair during bleaching and dyeing
Patent number
4,138,478
Issue date
Feb 6, 1979
Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
Gunter Reese
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Oxidation hair dyes based upon tetraaminopyrimidine developers and...
Patent number
4,129,413
Issue date
Dec 12, 1978
Henkel Kommanditgesellschaft Auf Aktien (Henkel KGaA)
David Rose
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE