Process for preparing soft tinted lenses
US6048371A · kind A · utility
1Cited by
27References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1997 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P1/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing a soft, tinted lens is described. The process comprises the steps of softening and tinting a xerogel lens 1, wherein the softening and the tinting are achieved by immersing the xerogel lens 1 in a single solution 5 capable of softening and tinting the xerogel lens 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.