ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,049, issued on May 13, was assigned to Lennox Industries Inc. (Richardson, Texas).

"System and method for identifying a refrigerant leak in multiple refrigeration circuits with one or more compressors" was invented by Rakesh Goel (Irving, Texas), Siddarth Rajan (Addison, Texas) and Vijay Kumar Sathyamurthi (Frisco, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A refrigeration system detects a refrigerant leak by detecting that a refrigerant concentration is more than a threshold concentration. In response, the system accesses subcool, superheat, and saturation suction temperature values associated with the compressor circuits. The system dete...