Method of making lens with colored portion
US6248266A · kind A · utility
12Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Aug 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making a lens, such as a contact lens, with a colored portion involves introducing a lens-forming monomer mixture and an ionic colored material to a lens mold, applying an electrical field to the monomer mixture and the colored material, whereby the colored material migrates in response to the electrical field to form a desired pattern, and curing the lens-forming monomer mixture with the colored material forming a desired colored pattern in the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.