Mitsubishi Chemical Assigned Patent

Mitsubishi Chemical Corp., Tokyo, Japan, has been assigned a patent (11,378,881) developed by Tanaka, Asato, and Shimizu, Takanori, Tokyo, Japan, for “composition for holographic recording medium, cured product for holographic recording medium, and holographic recording medium.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A holographic recording medium composition contains an isocyanate group-containing compound (component (a-1)), an isocyanate-reactive functional group-containing compound (component (b-1)), a polymerizable monomer (component (c-1)), a photopolymerization initiator (component (d-1)), and a stable nitroxyl radical group-containing compound (component (e-1)). A ratio of the total weight of a propylene glycol unit and a tetramethylene glycol unit that are contained in the component (b-1) to the total weight of the component (a-1) and the component (b-1) is 30% or less.”

The patent application was filed on November 25, 2020 (17/104,026).