Patents

L’Oréal Patents Multilayer Particle Sunscreen

Jun Sasai and Toshifumi Shiroya are credited with the work detailed in US Patent 12,029,801 B2.

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By: Christine Esposito

Editor-in-Chief

US Patent 12,029,801 B2 (Jun Sasai, Toshifumi Shiroya); L’Oréal, Paris, patented a multilayer UV filter particle comprised of an odd number of alternating layers of high and low refractive index materials. Each layer has a refractive index that differs from that of adjacent layers by at least 0.2, the total number of layers is at least 9, and the particle does not contain a substrate. The high refractive index material has a refractive index of larger than 1.7 and less than 5.0. The lo...

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