Helmut Seidler

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Bad Godesberg, DE

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Patents Grantslast 30 patents

Information Patent Grant
Sulphur dyestuffs
- Patent number 4,443,369
- Issue date Apr 17, 1984
- Bayer Aktiengesellschaft
- Helmut Seidler
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for the preparation of complex compounds of the cobalt Phth...
- Patent number 4,284,560
- Issue date Aug 18, 1981
- Bayer Aktiengesellschaft
- Helmut Seidler
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for the preparation of dimethoxyanthraquinones
- Patent number 4,278,607
- Issue date Jul 14, 1981
- Bayer Aktiengesellschaft
- Helmut Seidler
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 1,5-dichloroanthraquinone
- Patent number 4,206,130
- Issue date Jun 3, 1980
- Bayer Aktiengesellschaft
- Helmut Herzog
Information Patent Grant
Process for the mononitration of anthraquinone
- Patent number 4,203,885
- Issue date May 20, 1980
- Bayer Aktiengesellschaft
- Walter Hohmann