ALEXANDRIA, Va., July 23 -- United States Patent no. 12,366,535, issued on July 22, was assigned to Northwestern University (Evanston, Ill.) and Georgia Tech Research Corp. (Atlanta).

"Tautomeric sensing using a covalent organic framework" was invented by Seth R. Marder (Atlanta), William R. Dichtel (Wilmette, Ill.), Samik Jhulki (Atlanta), Stephen Barlow (Atlanta) and Austin M. Evans (Evanston, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein are sensors including a covalent organic framework (COF). The COF includes tautomerically active subunits (TAS) capable of reversible iminol-to-ketoenamine tautomerism between a first tautomer and a second tautomer and linking groups. Methods of det...