A stent having a polymeric coating for controllably releasing an included active agent. The polymeric coating includes a blend of a first polymeric material, which if alone, would release the agent at a first, higher rate, and a second polymeric material, which if alone would release the agent at a second,...http://www.google.es/patents/US6569195?utm_source=gb-gplus-sharePatente US6569195 - Stent coating
