Methods of polymeric stent surface smoothing and resurfacing to reduce biologically active sites
US9078957B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2007 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L31/148
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides methods for fabricating a stent using a chemical treatment to smooth, polish or strengthen the stent. One such treatment involves exposing the stent to acetone or a similar solvent. In certain embodiments, the additional step comprises placing the stent in a bath containing acetone, or a similar solvent, where the bath also contains the polymer the stent is composed of. The acetone bath step may be conducted at a temperature that is below the glass transition temperature. The present invention also provides for methods of fabricating a stent using an acetone bath that comprises poly (lactic) acid. Other embodiments provide for methods of fabricating a stent using an acetone bath that comprises poly (lactic) acid and polyethylene glycol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.