ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,255, issued on Dec. 30, was assigned to HUNT UTILITIES GROUP LLC (Pine River, Minn.).

"System and method for hydronic distribution with submersible pumps in an unpressurized tank" was invented by Paul C. Hunt (Pine River, Minn.), Ryan P. Hunt (Pine River, Minn.), Simon H. Goble (Backus, Minn.) and Jacob I. Brower (Pine River, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heat distribution system, method and computer program product, including an unpressurized tank configured for holding a heat transfer fluid; and one or more submersible heat transfer fluid pumps configured to pump the heat transfer fluid to one or more heat load loops respe...