ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,300, issued on June 24, was assigned to Waters Technologies Corp. (Milford, Mass.).

"Polymer particles with a gradient composition and methods of production thereof" was invented by Darryl W. Brousmiche (Grafton, Mass.), Kevin Daniel Wyndham (Worcester, Mass.), Mingcheng Xu (Lexington, Mass.) and Michael F. Morris (Ashland, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The current invention provides a novel method to synthesize a mono-disperse non-porous polymer particles with a unique gradient composition from the core to the shell. In particular, the present invention offers the flexibility to design the chemical and physical properties of ...