Method of manufacturing silicone hydrogel contact lenses having reduced rates of evaporation
US11650352B2 · kind B2 · utility
0Cited by
20References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 14, 2021 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Dec 3, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/0048
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A wettable silicone hydrogel contact lens having a low ionoflux and low evaporation is manufactured by curing a silicone hydrogel polymerizable composition in a contact lens mold comprising front and back lens-forming surfaces, where one of the lens-forming surfaces has a higher polarity than the other lens-forming surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.