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Axel Westerhaus
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Krefeld, DE
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last 30 patents
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Patent Grant
Heat stable iron oxide pigments of upsilon-Fe.sub.2 O.sub.3 structu...
Patent number
5,049,193
Issue date
Sep 17, 1991
Bayer Aktiengesellschaft
Bernd Krockert
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
Iron oxide pigments, a process for their preparation and their use
Patent number
4,990,189
Issue date
Feb 5, 1991
Bayer Aktiengesellschaft
Jurgen Wiese
B82 - NANO-TECHNOLOGY
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Patent Grant
Color intensive iron oxide black pigments obtained by the nitrobenz...
Patent number
4,966,641
Issue date
Oct 30, 1990
Bayer Aktiengesellschaft
Axel Westerhaus
B82 - NANO-TECHNOLOGY