Patent ID: 7951846

Claim:
A pH-sensitive mixed polymeric micelle composition comprising (i) poly(L-histidine)-poly(ethylene glycol) block copolymer and poly(L-lactic acid)-poly(ethylene glycol) block copolymer, or (ii) poly(L-histidine)-poly(ethylene glycol) block copolymer-folate and poly(L-lactic acid)-poly(ethylene glycol) block copolymer, or (iii) poly(L-histidine)-poly(ethylene glycol) block copolymer and poly(L-lactic acid)-poly(ethylene glycol) block copolymer-folate, or (iv) poly(L-histidine)-poly(ethylene glycol) block copolymer-folate and poly(L-lactic acid)-poly(ethylene glycol) block copolymer-folate.