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Radiopaque intraluminal stents comprising cobalt-based alloys containing one or more platinum group metals, refractory metals, or combinations thereof

  • US 9,566,147 B2
  • Filed: 03/14/2013
  • Issued: 02/14/2017
  • Est. Priority Date: 11/17/2010
  • Status: Active Grant
First Claim
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1. A radiopaque stent, comprising:

  • a cylindrical main body comprising a cobalt-based alloy including cobalt, chromium, platinum, palladium, and an austenitic stabilizer for cobalt including a combination of manganese and optionally nickel, the cobalt-based alloy including less than 5 weight percent nickel and comprising no more than about 20 percent by weight iron;

    wherein the cobalt-based alloy has a relative radiopacity greater than 4.5 barnes/cm3, and wherein the radiopaque stent has at least 20% elongation to achieve adequate stent expansion;

    wherein an entirety of the stent is formed from the cobalt-based alloy.

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