Patent ID: 8652506

Claim:
An implantable medical device having a coating thereon wherein the coating comprises a block or graft copolymer that comprises at least a first block, a second block different from the first block, and a third block, wherein the first block is a poly(lactide-glycolide) copolymer, the second block is a member of the group consisting of lactide-glycolide copolymer having a higher percentage of lactide than the first block copolymer, polylactide homopolymer, poly(trimethylene carbonate), poly(caprolactone), poly(β-butyrolactone), poly(δ-valerolactone), and poly(tyrosine carbonate), the first and second blocks are characterized by respective degradation rates when the block copolymer is placed in the body of a subject animal, the degradation rate of the first block being greater than the degradation rate of the second block, and the third block being characterized by a degradation rate when the block copolymer is placed in the body of a subject animal that is different from the respective degradation rates of the first and second blocks.