ALEXANDRIA, Va., June 25 -- United States Patent no. 12,340,915, issued on June 24.

"Apparatus for production of lead-212 isotope" was invented by Ali A. Abbasi (New York).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for producing Pb-212. The apparatus comprises an emanation box that comprises an emanation source comprising a porous non-reactive material. The emanation box receives at least one of Th-228 and Ra-224, wherein the at least one of Th-228 and Ra-224 decays to Rn-220 within the emanation box. The apparatus further includes a carrier gas feed coupled to the emanation box. The carrier gas feed directs an inert gas into the emanation box and the inert gas carries the Rn-220 out of the e...