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Powdery flame retardant
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Patent number 6,627,122
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Issue date Sep 30, 2003
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Otsuka Chemical Co., Ltd.
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Yuji Tada
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Spiropyran compound
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Patent number 5,708,181
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Issue date Jan 13, 1998
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Otsuka Kagaku Kabushiki Kaisha
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Hiroshi Hama
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C07 - ORGANIC CHEMISTRY
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Iron dispersant for boiler water
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Patent number 4,877,535
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Issue date Oct 31, 1989
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Kurita Water Industries, Ltd.
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Kenji Kobayashi
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE