ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,277, issued on July 29, was assigned to Blue Star Ltd. (Mumbai, India).

"Method for controlling refrigerant liquid flood-back within a chiller and a system thereof" was invented by Sandeep Pasarkar (Thane West, India) and Harshavardhan Kothavale (Thane West, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "A refrigeration system includes a pump to deliver oil to the scroll compressor collected from the condenser and the evaporator. The refrigeration system also includes a heat exchanger in thermal communication with the oil at high temperature in the oil separator. Oil collected from the condenser and the evaporator is passed through the heat ex...