Patent ID: 7766957

Claim:
A biological organ dilating stent comprising: a tubular body possessing an outer diameter permitting insertion of the tubular body into a biological lumen and expandable upon application of a radially outwardly directed expansion force from inside the tubular body; the tubular body having an outer surface adapted to contact a wall of the biological lumen and being entirely fabricated from an alloy containing 65-80% weight gold, 0.2-12.5% weight platinum, 0.3-17% weight silver, and 0.3-16% weight copper; the alloy does not contain any of mercury, nickel, cobalt, tin, palladium and chromium; the alloy possessing a density not less than 14 g/cm 3 ; the alloy possessing a proof stress not less than 300 MPa; and the alloy possessing an elongation-to-break not less than 20%.