ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,662, issued on July 8, was assigned to NITTO DENKO Corp. (Ibaraki, Japan).
"Optical resin composition manufacturing method and optical resin composition" was invented by Tomoaki Hishiki (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a method for manufacturing an optical resin composition that is less colored and that has a sufficiently low water absorbability. The optical resin composition manufacturing method according to the present invention includes performing a heat treatment of a fluorine-containing polymer under an atmosphere having a water vapor concentration of 100 volppm or less, the fluorine-con...