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Gerhard Zirkenbach
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Rudesheim, DE
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last 30 patents
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Patent Grant
Aqueous liquid formulations of pyrazoline brighteners
Patent number
7,300,474
Issue date
Nov 27, 2007
Clariant Produkte (Deutschland) GmbH
Gerhard Zirkenbach
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Patent Grant
Process for the preparation of pyrene compounds
Patent number
5,322,941
Issue date
Jun 21, 1994
Hoechst Aktiengesellschaft
Bernhard Mees
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
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Patent Application
Aqueous liquid formulations of pyrazoline brighteners
Publication number
20050251931
Publication date
Nov 17, 2005
Gerhard Zirkenbach
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Patent Application
Method for the production of optically brightened polyester
Publication number
20050101703
Publication date
May 12, 2005
Thomas Martini
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...