Radiopaque intraluminal stents comprising cobalt-based alloys with primarily single-phase supersaturated tungsten content
US11298251B2 · kind B2 · utility
4Cited by
46References
22Claims
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Key dates
| Filing date | Oct 14, 2019 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Feb 16, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C27/06
- 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. Tungsten is present above its solubility limit (about 15%), 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.