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Paper coating composition
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Patent number 5,158,611
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Issue date Oct 27, 1992
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Sumitomo Chemical Co., Ltd.
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Shigeru Ura
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Paper coating composition
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Patent number 4,657,821
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Issue date Apr 14, 1987
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Sumitomo Chemical Co., Ltd.
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Shigeru Ura
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Amphoteric polyelectrolyte
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Patent number 4,251,651
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Issue date Feb 17, 1981
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Sumitomo Chemical Company, Limited
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Shigenao Kawakami
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Transparentizing agent for paper
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Patent number 4,128,437
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Issue date Dec 5, 1978
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Sumitomo Chemical Company, Limited
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Shigeru Ura
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE