Method of making lens with colored portion
US6467904B1 · kind B1 · utility
3Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jan 24, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0041
- 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 a colored material to a lens mold, applying a magnetic field to the monomer mixture and the colored material, whereby the colored material migrates in response to the magnetic 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.