ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,934, issued on Oct. 7, was assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit).

"Multi-stage chiller" was invented by Cameron Paul Smith (Milford, Mich.), Tapan Gaurav Dangarwala (Royal Oak, Mich.) and Kyle Holihan (South Lyon, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A thermal management system including a heat exchanger and an expansion valve. The expansion valve is in fluid communication with the heat exchanger to control flow of a first heat exchange medium to the heat exchanger. The expansion valve includes a valve inlet, a first valve outlet in fluid communication with a first inlet and first passageways of the heat exchanger,...