ALEXANDRIA, Va., July 9 -- United States Patent no. 12,350,647, issued on July 8, was assigned to BASF SE (Ludwigshafen, Germany).
"Method for producing superabsorbent particles" was invented by Monica Haag (Ludwigshafen, Germany) and Stefan Gierescher (Ludwigshafen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process for producing superabsorbent particles, comprising polymerization of a monomer preparation, drying of the resultant aqueous polymer gel, grinding, classifying and thermal surface postcrosslinking, wherein the monomer preparation is produced by mixing an aqueous monomer solution and a foamed aqueous surfactant solution."
The patent was filed on Jan. 13, 2020, under Application No. ...