ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,534, issued on Dec. 30, was assigned to CHENGDU YINGCHEN TECHNOLOGY Co. LTD (Chengdu, China).

"Method for mobile pressure swing adsorption oxygen production device" was invented by Yuwen Song (Sichuan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a method for a mobile pressure swing adsorption oxygen production device, comprising a first PSA section, a second PSA section and a third PSA section which are operated in series; the first PSA section adsorbs oxygen in raw air by a velocity-selective adsorbent; the second PSA section adsorbs nitrogen etc. in desorption gas of the first PSA section by a nitrogen bala...