ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,782,024, issued on Nov. 3, was assigned to S.A. Armstrong Ltd. (Toronto).

"Automatic maintenance and flow control of heat exchanger" was invented by Zeljko Terzic (Toronto), Redmond Hum (Toronto), Marcelo Javier Acosta Gonzalez (Toronto) and Ritesh Patel (Toronto).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heat transfer system that includes one or more heat exchangers and one or more control pumps that control flow through the heat exchangers. In order to source a variable load, the control pumps can be controlled to operate at less than full duty flow. In an example embodiment, a controller can calculate, when each heat exchanger is clean, coeffici...