ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,700, issued on April 14, was assigned to Roche Diagnostics Operations Inc. (Indianapolis).

"Imidazolium reagent for mass spectrometry" was invented by Robert Hahn (Munich), Dieter Heindl (Munich), Hans-Peter Josel (Weilheim, Germany), Uwe Kobold (Weilheim, Germany), Hannes Kuchelmeister (Munich), Daniela Mazzier (Munich), Giuseppe Prencipe (Penzberg, Germany), Martin Rempt (Penzberg, Germany) and Christoph Seidel (Tutzing, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to compounds which are suitable to be used in mass spectrometry as well as methods of mass spectrometric determination of analyte molecules usin...