ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,663, issued on Feb. 24, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).

"Cement slurry compositions comprising pozzolanic cement additives and methods for improving development of compressive strengths in the cement slurry compositions" was invented by Bernardo Engelke (Houston), Lynn Foster (Pearland, Texas) and Valerie Lafitte (Sugar Land, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Pumpable slurry compositions including at least one aluminosilicate additive and optional pozzolanic cement additives and methods including the pumpable slurry compositions improve development of compressive strengths in the pumpable cement ...