Methods for manufacturing radiopaque intraluminal stents comprising cobalt-based alloys with supersaturated tungsten content
US12151049B2 · kind B2 · utility
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Key dates
| Filing date | Oct 12, 2020 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Apr 23, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Embodiments are directed to radiopaque implantable structures (e.g., stents) formed of cobalt-based alloys that comprise cobalt, chromium, tungsten, and nickel, and methods for their manufacture. Tungsten is present above its solubility limit (about 15%) at ambient temperature, but is still only present as a super-saturated, primarily single-phase material exhibiting an FCC microcrystalline structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.