US Patent Issued to E.ON SVERIGE on June 17 for "Method for filling a trench comprising a pair of conduits and such a filled trench" (Swedish Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,870, issued on June 17, was assigned to E.ON SVERIGE AB (Malmo, Sweden).

"Method for filling a trench comprising a pair of conduits and such a filled trench" was invented by Per Rosen (Lund, Sweden), Jacob Skogstrom (Lomma, Sweden), Bengt Lindoff (Bjarred, Sweden) and Fredrik Rosenqvist (Helsingborg, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A filled trench is disclosed. The filled trench comprises: a pair of conduits (3a, 3b) for delivering fluid with a different temperature in each of the conduits (3a, 3b), the pair of conduits (3a, 3b) being surrounded by filling material; a first section (5a) filled with a filling material of a first...