US Patent Issued to Essilor International on Feb. 18 for "Injection overmolding with heat/cool cycling for making optical lenses using 3D-printed functional wafers" (Massachusetts Inventors)

ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,226,968, issued on Feb. 18, was assigned to Essilor International (Charenton-le-Pont, France).

"Injection overmolding with heat/cool cycling for making optical lenses using 3D-printed functional wafers" was invented by Haifeng Shan (Shrewsbury, Mass.), Aref Jallouli (Shrewsbury, Mass.) and Hao-Wen Chiu (Holden, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an injection molding method for making optical thermoplastic lenses using 3D-printed functional wafers. The method employs a variable injection molding cavity temperature that is heated to at least wafer Tg-10deg C."

The patent was filed on July 1, 2020, under Application N...