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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Paper coating resin and paper coating composition
Patent number
5,270,355
Issue date
Dec 14, 1993
Dic-Hercules Chemicals, Inc.
Hiroharu Kawano
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Process for preparing a sulfonated chitosan
Patent number
5,229,504
Issue date
Jul 20, 1993
Dic-Hercules Chemicals, Inc.
Jisuke Hayashi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymeric papermaking additive
Patent number
5,115,065
Issue date
May 19, 1992
Dic-Hercules Chemicals, Inc.
Masatomi Ogawa
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Surface treatment agent for paper
Patent number
5,079,303
Issue date
Jan 7, 1992
Dic-Hercules Chemicals, Inc.
Tsuyoshi Ikeda
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Sizing composition and sizing method
Patent number
5,013,775
Issue date
May 7, 1991
Dic-Hercules Chemicals, Inc.
Hideo Oikawa
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Rosin emulsion sizing agent
Patent number
4,943,608
Issue date
Jul 24, 1990
Dic-Hercules Chemicals, Inc.
Mizunori Takahashi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Papermaking additive
Patent number
4,717,758
Issue date
Jan 5, 1988
Dic-Hercules Chemicals, Inc.
Masatomi Ogawa
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Rosin emulsion sizing agent
Patent number
4,681,909
Issue date
Jul 21, 1987
Dic-Hercules Chemicals, Inc.
Koji Ohta
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Ketene dimer-acrylamide polymer aqueous dispersion
Patent number
4,654,386
Issue date
Mar 31, 1987
Dic-Hercules Chemicals, Inc.
Tetsuya Hara
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Patents Applications
last 30 patents
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