ALEXANDRIA, Va., July 15 -- United States Patent no. 12,665,212, issued on June 23.

"Gravitational cascade flow battery" was invented by Henry Hardy Perritt Jr. (Charlottesville, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gravitational cascade flow battery achieves practical energy density of 200 Wh/L through micro-encapsulated phase change materials and eliminates mechanical components using acoustically-controlled thixotropic flow. The system comprises a vertical tower where gel-state electrolyte slurries flow through cascaded reaction stages only when acoustic chokes locally liquefy the fluid through ultrasonic stimulation. Smooth micro-encapsulated spheres contain crystallizing active materials...