Vitreoretinal silicone tamponades made by supercritical fluid extraction
US7276619B2 · kind B2 · utility
63Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2004 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Aug 9, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for the purification of a silicone oil or fluid using neat supercritical carbon dioxide or a supercritical carbon dioxide mixture extraction to produce vitreoretinal silicone tamponades. The subject process is an economical, highly effective, reproducible, contaminant-free method by which unreacted relatively low molecular weight cyclic siloxanes and oligomers are removed from relatively high molecular weight silicone oil or fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.