Patent ID: 9474637
Filing Date: 2016-10-25
CPC Classification: A61F,A61L

Claim Text:
1. An intraluminal medical device comprising: a scaffold structure formed from an amount of a biodegradable metallic material having a surface; and at least one coating affixed directly to the surface of the scaffold structure, the at least one coating comprising a high molecular weight acid generating polymer formed from a chemical blend of a polycaprolactone having a molecular weight of at least one hundred kilodaltons and a polylactide-co-glycolide having a molecular weight of less than ten kilodaltons, the weight ratio high molecular weight polycaprolactone to low molecular weight polylactide-co-glycolide is in the range from about 5:1 to about 1:5, wherein the high molecular weight acid generating polymer and low molecular weight acid generating polymer are configured to control degradation time of the scaffold structure and local pH level and are present in amounts selected to provide a steady supply of acidic end-groups to counter balance degradation of the amount of biodegradable metallic material of the scaffold structure.