Silicone hydrogel ophthalmic devices molded in vinyl alcohol copolymer molds and related methods
US8979261B2 · kind B2 · utility
5Cited by
10References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 13, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Apr 5, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/109
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Silicone hydrogel ophthalmic devices, such as ocular inserts and contact lenses, formed in direct contact with molds comprising at least one vinyl alcohol copolymer and related methods are described. The at least one vinyl alcohol copolymer of the molds is a vinyl alcohol copolymer other than an ethylene-vinyl alcohol copolymer. The methods of manufacturing ophthalmic devices can use dry or wet demolding processes, or dry or wet delensing processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.