US Patent Issued to NIHON KENSETSU GIJUTSU on July 14 for "Water-permeable-retentive pavement structure and method of constructing the structure" (Japanese Inventor)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,235, issued on July 14, was assigned to NIHON KENSETSU GIJUTSU Co. LTD. (Saga, Japan).

"Water-permeable-retentive pavement structure and method of constructing the structure" was invented by Yutaka Hara (Saga, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A water-permeable-retentive pavement structure that includes: a water absorption column formed by filling foam glass in a hole, the foam glass having a continuous pore structure with a grain diameter of 1.0 mm to 2.0 mm, and the hole being formed through a roadbed to a depth below a groundwater level; a road subgrade formed on the roadbed, the road subgrade including the foam glass having a ...