Process for purifying and reusing solvent used to remove extractables
US6423820B1 · kind B1 · utility
4Cited by
29References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Oct 11, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and thereby removes the extractables from the device, treating the solvent to remove extractables from the solvent, thereby purifying the solvent, and using the purified solvent to remove additional extractables from polymeric devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.