Radiopaque intraluminal stents comprising cobalt-based alloys containing one or more platinum group metals, refractory metals, or combinations thereof
US10441445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2017 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Dec 29, 2037 |
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 and one or more platinum group metals, refractory metals, precious metals, or combinations thereof. Platinum group metals include platinum, palladium, ruthenium, rhodium, osmium, and iridium. Refractory metals include zirconium, niobium, rhodium, molybdenum, hafnium, tantalum, tungsten, rhenium, and precious metals include silver and gold. In one embodiment, the one or more included platinum group or refractory metals substitute at least partially for nickel, such that the alloy exhibits reduced nickel content, or is substantially nickel free. The stents exhibit improved radiopacity as compared to similar alloys including greater amounts of nickel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.