ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,275, issued on Oct. 6, was assigned to CEM Corp. (Matthews, N.C.).

"Pressure-stepped chemical reactions and associated methods, systems, apparatuses, and articles" was invented by Timothy Adam Zawatsky (Matthews, N.C.), Steven Francis Guilmette (Harrisburg, N.C.), William Edward Jennings (Wingate, N.C.) and Ian Stuart Goldstein (Matthews, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In an acid digestion reaction performed in a vessel, an elastic lid or septum can be mounted to the mouth of the vessel with a flanged band. In response to determining that a predetermined pressure has been reached in the vessel, a closing force being applied to th...