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

  • US 10,441,445 B2
  • Filed: 02/10/2017
  • Issued: 10/15/2019
  • 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 comprising cobalt, chromium, an austenitic stabilizer for cobalt including a combination of manganese and nickel, and one or more platinum group metals or precious metals selected from the group of platinum, palladium, rhodium, iridium, osmium, ruthenium, silver and gold;

    wherein the cobalt-based alloy comprises from 31 weight percent to 51 weight percent cobalt, from 15 weight percent to 20 weight percent chromium, from 8 weight percent to 30 weight percent of the one or more platinum group metals or precious metals;

    wherein the cobalt-based alloy comprising up to 8 weight percent nickel, up to 20 weight percent manganese, a combined weight percentage of manganese and nickel being up to 25 weight percent, the cobalt-based alloy comprising no more than about 20 percent by weight iron,wherein an entirety of the stent is formed from the cobalt-based alloy.

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