Edgar Siegel

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Patents Grantslast 30 patents

Information Patent Grant
Sulfaphenyl-azo-phenyl-azo-aminophenyl dyestuffs
- Patent number 4,022,763
- Issue date May 10, 1977
- Bayer Aktiengesellschaft
- Richard Sommer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Disazo dyestuffs
- Patent number 3,997,522
- Issue date Dec 14, 1976
- Bayer Aktiengesellschaft
- Edgar Siegel
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...