Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-06-05
2007-06-05
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S054200, C525S054300, C524S029000, C524S500000, C514S054000, C514S777000
Reexamination Certificate
active
10756351
ABSTRACT:
The present invention provides a process for the production of hyaluronic acid (HA) derivatives cross-linked with another polymer, in particular multiple e.g. double cross-linked hyaluronic acid derivatives. The invention also provides novel cross-linked derivatives, products containing them and their uses in cosmetic, medical and pharmaceutical applications.
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Alexander Catherine
Fraser Jane
Zhao Xiaobin
Fish & Richardson P.C.
Mentor Biopolymers Limited
Sastri Satya
Wu David W.
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