Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2011-01-04
2011-01-04
Gulakowski, Randy (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S303000, C528S306000, C528S328000, C528S345000, C528S392000, C525S054100, C525S054200, C525S421000, C525S434000, C525S436000, C525S437000, C525S447000, C424S497000
Reexamination Certificate
active
07863406
ABSTRACT:
Biodegradable poly(ester-amides) are synthesized from amino acids, diols and dicarboxylic acids where one or both of the diols and dicarboxylic acids contain unsaturation; e.g., from di-p-nitrophenyl dicarboxylates and p-toluenesulfonic acid salts of bis(alpha-amino acid) disesters of diols where one or both of the dicarboxylate and diol moieties contain unsaturation or from di-p-nitrophenyl dicarboxylates, and p-toluene-sulfonic acid salts of bis(alpha-amino acid) diesters of diols and p-toluenesulfonic acid salt of lysine ester where one or both of the dicarboxylate and diol moieties contain unsaturation. The polymers are useful as biodegradable carriers for drugs of other bioactive agents.
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Katsarava, R., et al., “Amino Acid-Based Bioanalogous Polymers. Synthesis, and Study of Regular Poly(ester amide)s Based on Bis(α-amino acid) α,ω-Alkene Diesters, and Aliphatic Dicarboxylic Acids”, J. of Poly. Sci.: Part A: Poly. Chem., vol. 37, 391-407 (1999).
Chu Chih-Chang
Guo Kai
Katsarava Ramaz
Cornell Research Foundation Inc.
Gulakowski Randy
Hodgson & Russ LLP
Kahn Rachel
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