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Color former mixture
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Patent number 6,143,904
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Issue date Nov 7, 2000
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Ciba Specialty Chemicals Corporation
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Rudolf Zink
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C07 - ORGANIC CHEMISTRY
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Color former mixture
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Patent number 5,681,791
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Issue date Oct 28, 1997
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Ciba-Geigy Corporation
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Rudolf Zink
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C07 - ORGANIC CHEMISTRY
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Bislactones
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Patent number 5,468,855
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Issue date Nov 21, 1995
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Ciba-Geigy Corporation
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Rudolf Zink
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C07 - ORGANIC CHEMISTRY
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Fluoran color formers
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Patent number 5,395,948
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Issue date Mar 7, 1995
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Ciba-Geigy Corporation
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Rudolf Zink
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C07 - ORGANIC CHEMISTRY
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Heat-sensitive recording material
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Patent number 5,240,897
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Issue date Aug 31, 1993
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Ciba-Geigy Corporation
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Rosalinde Braun
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Chromogenic phthalides
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Patent number 5,143,892
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Issue date Sep 1, 1992
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Ciba-Geigy Corporation
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Rudolf Zink
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Chromogenic phthalides
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Patent number 5,039,822
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Issue date Aug 13, 1991
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Ciba-Geigy Corporation
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Rudolf Zink
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Benzthiazolium azo dyes
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Patent number 4,997,918
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Issue date Mar 5, 1991
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Ciba-Geigy Corporation
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Rudolf Zink
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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Chromogenic quinazolines
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Patent number 4,766,211
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Issue date Aug 23, 1988
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Ciba-Geigy Corporation
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Rudolf Zink
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C07 - ORGANIC CHEMISTRY
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