Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Carbohydrate doai
Reexamination Certificate
2006-05-30
2006-05-30
Barts, Samuel (Department: 1623)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Carbohydrate doai
C514S054000, C536S055100, C536S020000, C536S055300
Reexamination Certificate
active
07053068
ABSTRACT:
By the reaction of chitosan with iminothiolactones such as 2-iminothiolane, thiol groups can be covalently immobilized on the polymer. The resulting chitosan derivatives exhibit thiol groups which are capable of forming inter- and intramolecular disulfide bonds. Because of this crosslinking process the viscosity of polymer solutions is strongly improved. Moreover, the cationic character of the polymer is strongly improved. Preferred applications of these novel chitosan derivatives are their cosmetic and pharmaceutical use
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Barts Samuel
Fulbright & Jaworski L.L.P.
Henry Michael C.
Mucobiomer Biotechnologische Forschungs- und Entwicklungs GESmbH
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