Contact lens
US4084890A · kind A · utility
19Cited by
4References
6Claims
0Family size
Inventor
Key dates
| Filing date | May 7, 1975 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | May 7, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A contact lens formed from a soft, flexible, hydrophilic, cross-linked polymeric material. The lens has a centrally located optical zone and an outer peripheral portion that has its maximum thickness intermediate the juncture of that portion with the optical zone and the thin edge of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.