ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,494, issued on April 14, was assigned to Yotrio Group Co. Ltd. (Linhai, China).
"Low-smoke carbon furnace" was invented by Huian Luo (Linhai, China) and Jianqiang Xie (Linhai, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A low-smoke carbon furnace including an outer casing, a removable liner, and an annular interlayer is provided. The removable liner is disposed in the outer casing. The removable liner is provided with a combustion chamber therewithin. The removable liner includes multiple secondary air inlets disposed on an upper side wall of the removable liner. The annular interlayer is disposed between the outer casing and the removable...