US Patent Issued to ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA on July 1 for "Photochemically stable, non-leaching, bridged polysilsesquioxane based sunscreens" (Arizona Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,343,424, issued on July 1, was assigned to ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA (Tucson, Ariz.).

"Photochemically stable, non-leaching, bridged polysilsesquioxane based sunscreens" was invented by Douglas A. Loy (Tucson, Ariz.) and Stephanie H. Tolbert (Tucson, Ariz.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Bridged polysilsesquioxane based sunscreens prepared as nanoparticles via oil/water microemulsion polymerization, sol-gel polymerizations, or a modified Stober process. Minimized leaching and decreased levels of photo-degradation were achieved with covalent incorporation, with bridged incorporation necessary to ensure ...