Vascular and endoluminal stents with improved coatings
US6387121B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Aug 8, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/0088
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stent has a tubular metal base adapted to be expanded from a first vessel-navigable diameter to a larger second vessel-deployed diameter; a thin, continuous intermediate layer of noble metal or alloy thereof selected from a group consisting of niobium, zirconium, titanium and tantalum, overlying and tightly adherent to an exposed surface area of the tubular metal base; and a biocompatible outer layer of iridium oxide overlying and adherent to the intermediate layer. The outer layer has a relatively rough surface with interstices into which beneficial drugs or other substances or agents may be infused, with or without a biodegradable carrier, to preclude occlusion from restenosis or thrombosis during the acute stage following deployment of the stent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.