ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,161, issued on Aug. 5, was assigned to DENKA COMPANY Ltd. (Chuo-ku, Japan).
"Cement admixture, expansion material, and cement composition" was invented by Daiki Shimazaki (Ichihara, Japan) and Taiichiro Mori (Itoigawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cement admixture containing free lime, gypsum, Ye'elimite, and ternesite, wherein the cement admixture has a mass ratio of the Ye'elimite to the ternesite (Ye'elimite/ternesite) of from 0.5 to 40. The cement admixture contains 20 to 80 mass % of the free lime. The cement admixture has a total mass ratio of the free lime and the gypsum anhydride to the ternesite ((free lime+gypsum a...