ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,669, issued on July 28, was assigned to NICHIREKI GROUP Co. LTD. (Tokyo).

"Method for constructing a base course and a mixture used therefor" was invented by Koki Banba (Tochigi, Japan), Tomio Hiraoka (Tochigi, Japan), Hiroyuki Iitaka (Tochigi, Japan) and Takahiro Yamamoto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method is provided for constructing a base course without rolling compaction, in which a compacting step by rolling compaction and further adjustment of the water content of the mixture to the optimum water content are not necessary, and to provide a mixture for base course, which enables the said method. The method includes ...