Cellulose ethers

Details Cellulose ethers Cellulose ethers

2005-09-06

2005-09-06

Wilson, James O. (Department: 1623)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C536S056000

Reexamination Certificate

active

06939960

ABSTRACT:
A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ≧60%, based on the total degree of substitution.

REFERENCES:
patent: 3447939 (1969-06-01), Johnson
patent: 4145532 (1979-03-01), Franks et al.
patent: 4196282 (1980-04-01), Franks et al.
patent: 5626810 (1997-05-01), Zikeli et al.
patent: 6482940 (2002-11-01), Klohr et al.
patent: 207380 (1984-02-01), None
patent: 452610 (1991-10-01), None
patent: 1546858 (1968-11-01), None
Seneker et al, Polymeric Material Science & Engineering, 52 (month unavailable), 1985, pp. 39-43, “Utilization of N-Methylmorpholine N-Oxide in Delineation of substituent Placement in Carbohydrate, Polymers”.

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