ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,825, issued on May 20, was assigned to Natron Energy Inc. (Santa Clara, Calif.).
"Low vacancy Fe-substituted Mn-based prussian blue analogue" was invented by Ashenafi Damtew Mamuye (Milpitas, Calif.), Daniel Friebel (San Carlos, Calif.) and Aniruddh Shrivastava (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method implementing and manufacturing transition metal cyanide coordination compounds (TMCCC) comprising Na, Fe, Mn, C, H, N, S, and O, wherein the TMCCC have 0-14% hexacyanometallate vacancies such as for application in electrochemical cells, including sodium ion secondary batteries; further including both sodium a...