ALEXANDRIA, Va., July 16 -- United States Patent no. 12,359,110, issued on July 15, was assigned to Oxy Low Carbon Ventures LLC (Houston).

"Methods involving cements that employ carbon dioxide as a reactant" was invented by Kenneth M. Cowan (Sugar Land, Texas), Robert L. Zeller III (Seabrook, Texas), Elias R. Callahan III (El Campo, Texas) and James S. Willis (Blanco, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of cementing an annular space between a pipe string and a well bore, the method comprising the steps of (a) providing a cement composition including a calcium-deficient calcium silicate; (b) mixing the cement composition with water to form a cement slurry; (c) mixing the cement slurr...