US Patent Issued to GM GLOBAL TECHNOLOGY OPERATIONS on Nov. 4 for "Vapor injection refrigerant systems" (Michigan Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,850, issued on Nov. 4, was assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit).

"Vapor injection refrigerant systems" was invented by Nathan John English (Brighton, Mich.), Lawrence P. Ziehr (Clarkston, Mich.) and Satish P. Ketkar (Troy, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vapor injection refrigerant system includes a compressor, a condenser coupled to the compressor, an evaporator coupled to the condenser, and a chiller coupled to the condenser. The compressor includes at least a first stage and a second stage and is configured to output refrigerant in vapor form. The chiller is configured to inject refrigerant in vapor form...