Protected magnesium alloys for bioresorbable stents
US11517649B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Jun 17, 2019 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Oct 2, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2420/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Biodegradable magnesium alloy implantable medical devices are protected to delay onset of corrosion, and thus biodegradability, or to corrode more uniformly. The protection allows for extended effective use of the devices while maintaining biodegradability. Examples of protective coatings include conversion coatings that at least partially remove exposed second phases from a surface of the magnesium alloy and coatings that provide a barrier between water and the surface of the magnesium alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.