Patent ID: 7101566

Claim:
Sustained release microparticles for parenteral administration of a therapeutic agent comprising: a core comprising a biodegradable polymer and therapeutically effective amount of said therapeutic agent, and a coating comprising a synthetic, bioabsorbable, biocompatible polymeric wax comprising the reaction product of a polybasic acid or derivative thereof and a monoglyceride, said monoglyceride is selected from the group consisting of monostearoyl glycerol, monopalmitoyl glycerol, monomyrisitoyl glycerol, monocaproyl glycerol, monodecanoyl glycerol, monolauroyl glycerol, monolinoleoyl glycerol and monooleoyl glycerol, said polymeric wax comprising an aliphatic polyester backbone with pendant fatty acid ester groups and having a melting point less than about 70° C., as determined by differential scanning calorimetry.