Enhanced radiopaque alloy stent
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United States of America Patent
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Issued Date -
Apr 24, 2003
app pub date -
Mar 28, 2002
filing date -
Jul 7, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention is directed toward a stent fabricated from an austenitic 300 series stainless steel alloy having improved radiopaque characteristics. The modified stainless steel alloy consists essentially of, in weight percent, about1 C Mn Si P S 0.030 2.000 0.750 0.023 0.010 max. max. max. max. max. Cr Mo Ni Fe 'X' 12.000- 000- 10.000- 46.185- 2.000-20.000 3.000 18.000 74.000 10.000 wherein variable 'X' could be selected from a group consisting of Gold, Osmium, Palladium, Rhenium, Tantalum, Iridium, Ruthenium or Tungsten, and mixtures thereof. The alloy provides a unique combination of strength, ductility, corrosion resistance and other mechanical properties which also has improved radiopaque characteristics in the thin sections necessary to manufacture a stent.
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