Ophthalmic device molds formed from water-soluble vinyl alcohol copolymer, ophthalmic devices molded therein, and related methods
US9492951B2 · kind B2 · utility
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17References
15Claims
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Key dates
| Filing date | Jun 13, 2011 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Jan 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/109
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Ophthalmic device molds made from at least one water-soluble vinyl alcohol copolymer, ophthalmic devices such as ocular inserts and contact lenses and including silicone hydrogel devices formed using these molds, packaged ophthalmic devices present in a solution comprising the at least one water-soluble vinyl alcohol copolymer, and related methods are described. The methods of manufacturing ophthalmic devices can use wet demolding processes, or wet delensing processes or both wet demolding and wet delensing processes involving dissolving the molds in water or an aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.