ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,698,256, issued on Aug. 4, was assigned to Ecolab USA Inc. (St. Paul, Minn.).
"Hydrocarbon functionalized polyamines for corrosion inhibition" was invented by Oussama Zenasni (Houston), John Nathan Scholz (Sugar Land, Texas), Philip Andrew Thornthwaite (Wigan, Great Britain), Maria DeJesus Marquez (Houston), Ana Ferrer Carrera (Missouri City, Texas) and Ashish Dhawan (Aurora, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Compositions and methods are provided for reducing, inhibiting, or preventing corrosion of a surface, the polyamine compounds corresponding to the structure of Formula 1 or 2, or a salt thereof:wherein X1 is -C(O)R9 or -[C(R10R11)]...