Method of marking plastic lenses
US4303701A · kind A · utility
20Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1979 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Dec 31, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of marking plastic lenses to selectively identify a lens by impregnating a fluorescent material into the surface of the lens so that when the lens is exposed to ultraviolet light it fluoresces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.