Patent ID: 9603931
Date: 2017-03-28
CPC Classifications: A61K,C07C,C08G,C08J

Claim:
1. A sustained release microparticle composition of protein, polypeptide or peptide drug, consisting of: i) a protein, polypeptide or peptide as an active ingredient, and ii) a complex of a water-soluble ionic polymer of the following chemical formula 6 having a number average molecular weight of 1,000 to 4,000 daltons with a multivalent metal ion, as a drug delivery carrier; wherein X and X′ are independently hydrogen, alkyl or aryl, m and n are independently an integer of 0 to 95, provided that 5<m+n<100, a and b are independently an integer of 1 to 6, R is unsubstituted or substituted —(CH wherein said active ingredient is entrapped within the complex.