Oxygen permeable hard contact lens formed from styrene monomer containing a silyl or siloxane group
US4594401A · kind A · utility
31Cited by
3References
13Claims
0Family size
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Key dates
| Filing date | Dec 27, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Dec 27, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An oxygen permeable hard contact lens having an improved oxygen permeability and an improved hardness and rigidity and an improved refractive index, made of a polymer comprising a styrene containing a silyl or siloxanyl group having at most 15 silicon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.