Primarily niobium stent
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 5, 2006
Grant Date -
May 8, 2003
app pub date -
Aug 31, 2002
filing date -
Sep 18, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
In a process of fabricating a stent composed primarily of niobium alloyed with a trace amount of zirconium, tantalum, or titanium for hardening, the stent is annealed under vacuum in a substantially oxygen-free environment. The vacuum is preferably maintained at pressure less than 10.sup.-4 millibars, oxygen-content less than about 80 parts per million, and the annealing temperature exceeds 400.degree. C. for at least one hour, and is preferably kept in a range from about 1100 1200.degree. C. for several hours. This may be followed by applying a surface layer of oxide, such as iridium oxide, with a thickness of 299 300 nm to the stent.
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