ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,869, issued on April 15, was assigned to COOPERVISION INTERNATIONAL Ltd. (Fareham, Great Britain).
"WS12-releasing contact lens" was invented by Erwin Si (Alameda, Calif.), Nancy Keir (Pleasanton, Calif.) and Subam Basuthkar Sundar Rao (San Ramon, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A WS12-releasing contact lens is described as well as method of manufacturing the same. The WS12-releasing contact lens comprises a polymeric lens body and WS12 releasably adhered to the polymeric lens body. The amount of WS12 releasably adhered to the polymeric lens body provides a basal tear concentration in lens wearers of 2 Mug/ml to 8 Mug/ml WS12 af...