Metal alloy for a stent
AssigneeICON Medical Corp.
InventorsJoseph G. Furst, Raymond W. Buckman, Jr., Udayan Patel
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Abstract
A stent that is at least partially formed of a novel metal alloy, which novel metal alloy improves the physical properties of the stent.
Claims32
A stent that is at least partially formed of a metal alloy which improves the strength and ductility of the stent, said metal alloy including at least about 95 weight percent of a solid solution of rhenium and molybdenum, said metal alloy including 45-50 weight percent rhenium and 50-55 weight percent molybdenum, said metal alloy including carbon and oxygen and having a carbon to oxygen atomic ratio of at least about 2:1, said metal alloy having an average yield strength of at least about 98 ksi and an average ultimate tensile strength of at least about 100 ksi, said metal alloy having an average grain size of over 5 ASTM, said metal alloy having an average tensile elongation of at least about 25%, said metal alloy having a carbon to nitrogen atomic ratio of less than about 40:1 and an oxygen to nitrogen atomic ratio of less than about 30:1.
A stent that is formed of at least about 80 weight percent of a metal alloy which improves the strength and ductility of the stent, said metal alloy including at least about 99.9 weight percent of a solid solution of rhenium and molybdenum, said metal alloy including carbon and oxygen and having a carbon to oxygen atomic ratio of at least about 2:1 and less than about 50:1, said metal alloy having a carbon to nitrogen atomic ratio of less than about 40:1 and an oxygen to nitrogen atomic ratio of less than about 30:1, said metal alloy having an average yield strength of about 98-122 ksi and an average ultimate tensile strength of about 100-150 ksi, said metal alloy having an average grain size of about 6-9 ASTM, said metal alloy having an average tensile elongation of about 25-35%, and including by weight percent:
- C
- <150 ppm
- Mo
- 51–56%
- O
- <50 ppm
- N
- <20 ppm
- Re
- 44–49%.
Dependencies are inferred from the claim text.