Process for purifying and reusing solvent used to remove extractables
US7022813B2 · kind B2 · utility
3Cited by
32References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2002 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Jan 8, 2024 |
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.