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Effect pigments
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Patent number 11,773,270
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Issue date Oct 3, 2023
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Merck Patent GmbH
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Gerhard Pfaff
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Interference pigments
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Patent number 8,500,901
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Issue date Aug 6, 2013
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Merck Patent GmbH
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Reinhold Rueger
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C01 - INORGANIC CHEMISTRY
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Multilayered interference pigments
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Patent number 6,132,873
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Issue date Oct 17, 2000
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Merck Patent Gesellschaft mit beschrankter Haftung
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Johann Dietz
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C01 - INORGANIC CHEMISTRY
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Non-lustrous pigments
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Patent number 6,019,831
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Issue date Feb 1, 2000
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Merck Patent Gesellschaft mit beschrankter Haftung
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Christoph Schmidt
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C01 - INORGANIC CHEMISTRY
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Color pigments
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Patent number 5,759,257
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Issue date Jun 2, 1998
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Merck Patent Gesellschaft mit beschrankter Haftung
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Klaus Ambrosius
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Iron oxide coated perlescent pigments
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Patent number 4,744,832
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Issue date May 17, 1988
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Merck Patent Gesellschaft mit beschrankter Haftung
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Klaus D. Franz
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Lacquering process using nacreous pigments
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Patent number 4,668,570
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Issue date May 26, 1987
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Merck Patent Gesellschaft mit beschraenketer Haftung
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Reiner Esselborn
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Nacreous pigments
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Patent number 4,482,389
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Issue date Nov 13, 1984
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Merck Patent Gesellschaft mit beschrankter Haftung
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Klaus-Dieter Franz
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C01 - INORGANIC CHEMISTRY