Patent ID: 7776991

Claim:
A medical article comprising a polymer formed by reaction of a polyol and a polycarboxylic acid, the polymer comprising a structure of a formula: wherein R 1 and R 3 are different from each other and each comprises a component selected from a group consisting of a chemical bond, substituted, unsubstituted, hetero-, straight-chained, branched, cyclic, saturated or unsaturated aliphatic radicals, and substituted, unsubstituted, or heteroaromatic radicals; R 2 and R 4 each comprises a component independently selected from a group consisting of substituted, unsubstituted, hetero-, straight-chained, branched, cyclic, saturated and unsaturated aliphatic radicals; and substituted, unsubstituted, and heteroaromatic radicals; the grouping is derived from polyacid HOOC—R 1 —COOH and diol HO—R 2 —OH; the grouping is derived from polyacid HOOC—R 3 —COOH and diol HO—R 4 —OH; polyacid HOOC—R 1 —COOH and polyacid HOOC—R 3 —COOH are each an aliphatic dicarboxylic acid independently selected from the group consisting of oxalic acid, malonic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecandioic acid, tridecanedioic acid, tetradecanedioic acid, petadecanedioic acid, hexadecanedioic acid, citric acid, maleic acid and fumaric acid; L 1 is a chemical bond or a linkage; X is an agent; L 2 is an optional linkage connecting X to the polymer; and m and n are integers not equal to 0.