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Karl-Heinz Reinhardt
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Leverkusen, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Process for preparing asymmetrical methine dyes
Patent number
6,465,659
Issue date
Oct 15, 2002
Bayer Aktiengesellschaft
Josef-Walter Stawitz
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the preparation of quinophthalones
Patent number
6,121,452
Issue date
Sep 19, 2000
Bayer Aktiengesellschaft
Dietmar Kalz
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Bridged perinones/quinophthalones
Patent number
5,955,614
Issue date
Sep 21, 1999
Bayer Aktiengesellschaft
Dietmar Kalz
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Bridged anthraquinones
Patent number
5,912,386
Issue date
Jun 15, 1999
Bayer Aktiengesellschaft
Dietmar Kalz
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Azodyestuffs, their preparation and their use
Patent number
5,646,257
Issue date
Jul 8, 1997
Bayer Aktiengesellschaft
Karin Hassenruck
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Process for the preparation of N,N'-disubstituted 1,4-diaminoanthra...
Patent number
5,639,896
Issue date
Jun 17, 1997
Bayer Aktiengesellschaft
Dietmar Kalz
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of naphthalene-1,8-dicarboximides
Patent number
4,892,950
Issue date
Jan 9, 1990
Bayer Aktiengesellschaft
Detlef-Ingo Schutze
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
PROCESS FOR PREPARING ASYMMETRICAL METHINE DYES
Publication number
20020128489
Publication date
Sep 12, 2002
Josef-Walter Stawitz
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...