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Gerhard Buttner
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Pulheim, DE
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last 30 patents
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Patent Grant
Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran
Patent number
4,647,676
Issue date
Mar 3, 1987
Bayer Aktiengesellschaft
Manfred Lenthe
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Isolation of dihydroxybenzene-monoethers from reaction mixtures
Patent number
4,486,611
Issue date
Dec 4, 1984
Bayer Aktiengesellschaft
Manfred Lenthe
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Preparation of monoalkyl ethers of hydroxyphenols
Patent number
4,383,126
Issue date
May 10, 1983
Bayer Aktiengesellschaft
Gerhard Buttner
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Preparation of certain 2-methyl-2,3-dihydro-benzofuran-7-ols
Patent number
4,321,204
Issue date
Mar 23, 1982
Bayer Aktiengesellschaft
Gerhard Buttner
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Monoazo dyestuffs containing diazo component substituted by disulfi...
Patent number
4,243,584
Issue date
Jan 6, 1981
Bayer Aktiengesellschaft
Richard Sommer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Patent Grant
Phenylazopyrazolo dyestuffs including disulfimide substituent
Patent number
4,159,265
Issue date
Jun 26, 1979
Bayer Aktiengesellschaft
Richard Sommer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...