ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,982, issued on Jan. 13, was assigned to JIANGXI HESHUOFENG NEW MATERIAL Co. LTD. (Jiangxi, China).

"Preparation method of eco-friendly long-lasting heat-sensitive paper" was invented by Xiaofeng Zhu (Jiangxi, China), Shengyang Qian (Jiangsu, China) and Xuehuang Yin (Jiangsu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses an eco-friendly long-lasting heat-sensitive paper, including a substrate layer, a base color layer, a heat-sensitive covering layer, and a protective layer that are arranged sequentially from bottom to top, where the heat-sensitive covering layer is prepared as follows: coating a heat-sensitiv...