ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,897, issued on Aug. 26, was assigned to SICHUAN WURUI TECH. Co. LTD. (Chengdu, China).

"Air purifying filter, apparatus including the same, and methods of making and using the same" was invented by Qinyong Zhang (Chengdu, China), Jialin Ren (Chengdu, China), Xiaobo Lei (Chengdu, China) and Guocai Yuan (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heatable air filter is disclosed. The air filter may be baffleless, and generally includes an outer frame and a filter assembly therein. The outer frame and the filter assembly are fixed together with a high-temperature sealant/adhesive. The filter assembly includes a filter medium, a hea...