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Aloysius Engel
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Leverkusen, DE
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last 30 patents
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Patent Grant
Reactive dyestuffs based on a substituted barbituric acid
Patent number
5,502,174
Issue date
Mar 26, 1996
Bayer Aktiengesellschaft
Stefan Ehrenberg
C07 - ORGANIC CHEMISTRY
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Patent Grant
2-hydrazono-4,6-dinitrobenzthiazolones useful to form dyestuffs and...
Patent number
4,962,040
Issue date
Oct 9, 1990
Bayer Aktiengesellschaft
Herbert Hugl
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Basic azo dyestuffs
Patent number
4,920,208
Issue date
Apr 24, 1990
Bayer Aktiengesellschaft
Aloysius Engel
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE