US Patent Issued to Ustav Organicke Chemie a Biochemie AV CR V.V.I on Oct. 6 for "Tetraazadodecane based chelating agents for separation of rare earth elements and method therefor" (Czech, American Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,219, issued on Oct. 6, was assigned to Ustav Organicke Chemie a Biochemie AV CR V.V.I (Prague).

"Tetraazadodecane based chelating agents for separation of rare earth elements and method therefor" was invented by Miloslav Polasek (Prague), Kelsea Grace Jones (Avon, N.Y.) and Tomas David (Hovorcovice, Czech Republic).

According to the abstract* released by the U.S. Patent & Trademark Office: "Compounds of general formula (I) for separations of rare earth elements (lanthanides) by precipitation are discussed, where R1 is selected from the group consisting of H; -CH2COOH; R2, R3, R4, R5 and R6 are independently selected from the group consisting of H; OH; -NO2; -COOH; phenyl; and/or R...