ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,922, issued on April 29, was assigned to Alcon Inc. (Fribourg, Switzerland).
"Method for making photofunctional contact lenses" was invented by Houliang Tang (Alpharetta, Ga.) and Frank Chang (Cumming, Ga.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Described herein is a method for producing a contact lens comprising a central zone that has a diameter of about 13 mm or less, is concentric with the central axis of the contact lens, and possesses at least one photo functionality. The method comprises: applying a first polymerizable fluid composition containing at least one photochemically functional compound on a central portion of the molding surfa...