Method for making contact lenses
US9802339B2 · kind B2 · utility
0Cited by
103References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2014 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Dec 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The instant invention pertains to a method and a fluid composition for producing contact lenses with improved lens quality and with increased product yield. The method of the invention involves applying to a molding surface of the mold a layer of mold releasing agent selected from a group consisting of fatty amines of carbon chain length C18 or less and silicones bearing pendant substituted pyrrolidone groups solution to reduce an averaged mold separation force by at least about 50% in comparison with that without the releasing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.