ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,400, issued on April 21, was assigned to Syntrees LLC (Palo Alto, Calif.).

"Direct air capture of CO2" was invented by Vaughan R. Pratt (Los Altos Hills, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system to remove CO2 from the air using ocean thermal energy conversion is disclosed. The system includes a pair of substantially vertically oriented concentric tapered tubular structures disposed in the ocean, with an upper end at or near the surface and a lower end at ocean depth. The tubular structures define an inner, substantially cylindrical air pathway and an outer, substantially annular pathway. Each of one or more bifans at correspon...