ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,395, issued on March 31, was assigned to Mettler-Toledo GmbH (Greifensee, Switzerland).

"Sample tray and apparatus for calorimetric or thermoanalytical investigation comprising said sample tray" was invented by Matthias Wagner (Villigen, Switzerland) and Samuel Schneider (Zollikon, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention is generally related to a sample tray for holding a sample of a material ready for a calorimetric or a thermoanalytical investigation and to an apparatus for a calorimetric or a thermoanalytical investigation comprising a calorimetric or a thermoanalytical measuring apparatus and said sample...