ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,057, issued on Feb. 4, was assigned to NIPPON SHOKUBAI Co. LTD. (Osaka, Japan).
"Cement additive, cement admixture, cement composition, molded body, and method for improving strength of molded body" was invented by Takeshi Takayama (Osaka, Japan), Kunihiko Ishizaki (Hyogo, Japan) and Shigeru Sakamoto (Hyogo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an additive for concrete in which viscosity of a cement composition is low and fluidity is high at an initial stage of casting even when the additive is added, and long-term strength of concrete or the like improves by the addition. A cement additive comprising a water-absorbent res...