ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,113, issued on Sept. 9, was assigned to International Flavors & Fragrances Inc. (New York).
"Polyurea or polyurethane capsules" was invented by Yabin Lei (Holmdel, N.J.), Li Xu (Edison, N.J.) and Lewis Michael Popplewell (Morganville, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Polyurea capsule compositions. A subset of these compositions contain a plurality of capsules and a capsule formation aid, in which each of the capsules contains a polyurea wall and an oil core; the polyurea wall is formed of a reaction product of a polyisocyanate and a cross-linking agent in the presence of the capsule formation aid; and the oil core contains an act...