ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,452, issued on Jan. 13, was assigned to Vivos Inc. (Richland, Wash.).

"Radiotherapy gel and method of preparing the same" was invented by Michael Korenko (Pasco, Wash.) and David Swanberg (Kennewick, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A radioactive thermogel suspension, including a thermogel and a plurality of radioactive yttrium phosphate particles suspended in the thermogel. The thermogel is PLGA-g-PEG. The thermogel contains less than 65 ppm stannous octanoate. The plurality of radioactive yttrium phosphate particles are between 0.03 um and 10 um in diameter. The plurality of radioactive yttrium phosphate particles are generally...