Patent ID: 7179283

Claim:
A stent-graft endoprosthesis comprising: a seamless tubular graft of biocompatible polymeric material having a wall thickness defining a luminal surface and an exterior surface; a radially expandable coated stent securably, circumferentially and axially disposed over said exterior surface, wherein said coated stent is coated with said biocompatible polymeric material, said stent being a metallic stent having an open lattice tubular structure; wherein said biocompatible polymeric material consists essentially of poly-para-xylylene having a formula of wherein n is from about 10 to about 10,000, x is from 0 to 4, R, which can be the same or different, is alkyl, aryl, alkenyl, amino, cyano, carboxyl, alkoxy, hydroxylalkyl, carbalkoxy, hydroxyl, nitro, chlorine, bromine, iodine and fluorine, and Y, which can be the same or different, is hydrogen, chlorine, bromine, iodine and fluorine.