US 12,453,681 B2
Structurally diverse, stable, and radiation-protective particle matrix sunscreen and cosmetic compositions and related methods
Laura C. Singleton, Inglewood, CA (US)
Assigned to LCS Advanced Solutions, LLC, Inglewood, CA (US)
Filed by LCS Advanced Solutions, LLC, Inglewood, CA (US)
Filed on Jul. 1, 2024, as Appl. No. 18/761,235.
Application 18/761,235 is a continuation of application No. 18/488,030, filed on Oct. 16, 2023, granted, now 12,059,487.
Claims priority of provisional application 63/475,135, filed on Oct. 15, 2022.
Prior Publication US 2024/0358609 A1, Oct. 31, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 8/25 (2006.01); A61K 8/06 (2006.01); A61K 8/27 (2006.01); A61K 8/29 (2006.01); A61Q 17/04 (2006.01)
CPC A61K 8/25 (2013.01) [A61K 8/064 (2013.01); A61K 8/27 (2013.01); A61K 8/29 (2013.01); A61Q 17/04 (2013.01); A61K 2800/31 (2013.01); A61K 2800/412 (2013.01)] 19 Claims
 
1. A composition suitable for topical administration comprising a matrix composition of a mixture of structurally diverse matrix particles that are formed from at least three different types of primary particles comprising (a) a first primary particle population, (b) a second primary particle population, and (c) a third primary particle population, wherein (i) the first primary particle population has an average particle size from 1000 nm to 8500 nm, makes up 4-9% of the composition by weight, and 20-70% of the first primary particle population comprises a glass composition, (ii) the second particle population has an average particle size from 250 nm to 500 nm, makes up 5-15% of the composition by weight and comprises UV-protective particles, (iii) the third particle population has an average particle size from 500 nm to 1000 nm, makes up 6.75-22% of the composition by weight, and at least 75% of the third particle population comprises UV-protective metal oxide particles, and (iv) the composition exhibits a sun protection factor (SPF) of at least 30, a critical wavelength of at least 370 nm, a UVA/UVB ratio of at least 0.333, and a UVA1 to UV ratio of at least 0.7.