ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,665, issued on Jan. 13, was assigned to University of Technology Sydney (Australia).

"In-field colour test for screening fentanyl and analogues thereof" was invented by Shanlin Fu (Ultimo, Australia), Ronald Gibrail Shimmon (Ultimo, Australia), Melanie Zoe Lauria (Ultimo, Australia), Joshua Charles Klingberg (Ultimo, Australia) and Laura Jane Clancy (Ultimo, Australia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of detecting the presence of fentanyl or a fentanyl analogue in a sample which comprises contacting the sample with a 1,2 naphthoquinone (such as 1,2-naphthoquinone itself) in a solvent, preferably acetonitrile, and observing a co...