Hokuetso Paper Mills, Ltd.

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Patents Grantslast 30 patents

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Process for making paper using a substituted succinic anhydride as...
- Patent number 4,849,055
- Issue date Jul 18, 1989
- Seiko Kagaku Kogyo Co., Ltd.
- Shigehiko Yoshioka
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE