Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Reexamination Certificate
2002-04-16
2008-03-18
Jiang, Shaojia Anna (Department: 1623)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
C536S020000, C536S055200, C536S124000
Reexamination Certificate
active
07345165
ABSTRACT:
A method for the preparation of water-soluble chitosan with high purity and biological activity includes steps of: reacting chitosan oligo sugar acid salt, covalently bonded to an organic or inorganic acid, with trialkylamine in phosphate buffered saline followed by addition of an organic solvent to remove acid salt at C-2 position; adding the thus obtained reaction mixture to an inorganic acid to remove trialkylamine salt at C-6 position; and passing the thus obtained free amine chitosan through an activated carbon/ion exchange resin. The free amine chitosan is water-soluble and has a high bioavailability for application to the medicine and food industries.
REFERENCES:
patent: 4528283 (1985-07-01), Lang et al.
patent: 4574150 (1986-03-01), Austin
patent: 4975542 (1990-12-01), Hirayama et al.
patent: 5599916 (1997-02-01), Dutkiewicz et al.
patent: 5708152 (1998-01-01), Lohmann et al.
patent: 06-220103 (1994-08-01), None
Son, Yang Kook, et al., Method For Preparing Chitosan Derivatives, Application No. 10-1999-0077670, Application Date. Dec. 30, 1997, Abstract of KR 99-57607 A.
Choi Chang Yong
Jang Ji Tae
Jang Mi Kyeong
Jeong Young Il
Kim Won Seok
Jae Woon Nah
Jiang Shaojia Anna
Lucas & Mercanti LLP
White Everett
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