NIPPON PMC CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5454907 Method of refining woodchips or beating wood pulp with a selectively sulfonated chitosanExpiredFeb 15, 94Oct 03, 95[D21B]
5438087 Paper sizing compositionExpiredJun 21, 93Aug 01, 95[C08L]
5270355 Paper coating resin and paper coating compositionExpiredJan 13, 92Dec 14, 93[C08K]
5229504 Process for preparing a sulfonated chitosanExpiredSep 06, 91Jul 20, 93[C07H, A61K, C08B]
5079303 Surface treatment agent for paperExpiredJul 12, 89Jan 07, 92[C08F]
5013775 Sizing composition and sizing methodExpiredApr 27, 89May 07, 91[C08K]
4943608 Rosin emulsion sizing agentExpiredOct 29, 87Jul 24, 90[C08L]
4654386 Ketene dimer-acrylamide polymer aqueous dispersionExpiredSep 04, 85Mar 31, 87[C08L]

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