US Patent Issued to Essilor International on July 15 for "Casting a lens with surface microstructures" (Massachusetts Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,358,244, issued on July 15, was assigned to Essilor International (Charenton-le-Pont, France).

"Casting a lens with surface microstructures" was invented by Hao-Wen Chiu (Holden, Mass.) and Aref Jallouli (Shrewsbury, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A mold element (350) is fabricated (305, 310, 315) using a first mold (5) with which microstructures (323) are integrally formed in relief on the mold element (350). A lens (340) is cast (320, 325, 330, 335) using a second mold (7) that includes the mold element (350) such that the microstructures (337) are integrally formed on the lens (340)."

The patent was filed on April 14, 2021, und...