ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,019, issued on April 15, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).

"Method for flotation of a silicate-containing iron ore with a cationic collector" was invented by Alexej Michailovski (Ludwigshafen, Germany), Alexander Panchenko (Ludwigshafen, Germany), Hannes Ferdinand Zipfel (Ludwigshafen, Germany), Martin Ernst (Ludwigshafen, Germany), Gabriela Budemberg (Ludwigshafen, Germany), Stefanov Nedko Drebov (Ludwigshafen, Germany), Sylvia von Krog (Ludwigshafen, Germany), Tamara Kuelzer (Ludwigshafen, Germany) and Long Phan (Ludwigshafen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for manufa...