ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,562, issued on Dec. 16, was assigned to DENKA COMPANY Ltd. (Tokyo).
"Beta-sialon phosphor particle and light emitting device" was invented by Tomohiro Nomiyama (Tokyo), Manabu Kobayashi (Tokyo), Masaru Miyazaki (Tokyo) and Tatsuya Okuzono (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A europium-doped Beta-sialon phosphor particle. When the element concentration of a Si atom on the surface portion of the particle that is obtained by analyzing a cross section of the phosphor particle by the energy dispersive X-ray analysis method is indicated by Ps [at %], and the element concentration of a Si atom near the center of the particle that is obtai...