RE:RE:RE:RE:RE:First Quantumhttps://patents.google.com/patent/US20190048437A1/en
Application granted Aug. 11 2020
“the right to exclude others from making, using, offering for sale, or selling the invention throughout the United States or importing the invention into the United States."
https://www.prnewswire.com/news-releases/cesium---the-most-important-metal-never-heard-of-301029446.html
Lots of work still to do.