ALEXANDRIA, Va., June 18 -- United States Patent no. 12,324,848, issued on June 10, was assigned to Colgate-Palmolive Co. (New York).

"Core shell silica particles and uses thereof as an anti-bacterial agent" was invented by Guisheng Pan (Philadelphia) and Suman Chopra (Monroe, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "This invention provides core shell silica particles, wherein each core shell silica particle comprises a silica core, and a surface of the silica core etched with group I metal silicate. These core shell silica particles have high surface charge density and anti-bacterial activity. Also provided are compositions comprising core shell silica particles, process of making the core shell ...