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Hans Gunter Otten
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Leverkusen, DT
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last 30 patents
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Patent Grant
Sulfo containing monoazo dyestuffs containing a benzthiazole diazo...
Patent number
4,041,024
Issue date
Aug 9, 1977
Bayer Aktiengesellschaft
Gerhard Wolfrum
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Patent Grant
Aminosulfonylphenyl-azo-indolyl dyestuffs
Patent number
4,000,123
Issue date
Dec 28, 1976
Bayer Aktiengesellschaft
Richard Sommer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...