ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,989, issued on Sept. 1, was assigned to Gradiant Corp. (Woburn, Mass.).

"Osmotic methods and systems involving energy recovery" was invented by Richard Stover (Waltham, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Liquid solution concentration methods and related systems involving osmosis units and energy recovery are generally described. In some embodiments, an osmotic system has a pump, a first reverse osmosis unit, a second reverse osmosis unit, and one or more energy recovery devices. Various embodiments are directed to features such as balancing streams, recirculation streams, and/or valving that alone or in combination may afford impro...