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US 2007/0182039 A1Published application
Methods and systems for processing complex shaped hydrogel devices
OwnerDouglas Vanderlaan, Dhannesh Dubey +2inventors
InventorsDouglas Vanderlaan, Dhannesh Dubey, James Ford, Frank Molock
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Abstract
The present invention provides methods and apparatus useful for facilitating one or more of the removal of unreacted components and diluents from an article fashioned from silicone hydrogel and release of the article from a mold part to which the article is adhered.
Claims20
A method for removing unreacted components and diluents from an ophthalmic lens comprising silicone, the method comprising:
- exposing said ophthalmic lens to a first aqueous solution comprising about 15% or more of a leaching agent comprising ethoxylated nonylphenol;
- heating said first aqueous solution to which the ophthalmic lens is exposed;
- and
- rinsing said ophthalmic lens through contact with a second aqueous solution until said lens comprises a level of unreacted components and diluents that is below a predetermined threshold.
1 more element
Dependencies are inferred from the claim text.