ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,184, issued on Dec. 16, was assigned to RAYTHEON TECHNOLOGIES Corp. (Arlington, Va.).
"Uniform chemical milling" was invented by Shane E. Haydt (Manchester, Conn.) and Brian A. Fisher (West Hartford, Conn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes additively manufacturing a heat exchanger with a plurality of fluid passages extending in a flow direction through the heat exchanger. The method includes chemical milling interior surfaces of the plurality of fluid passages, wherein chemically milling includes flowing chemical milling fluid through an inlet of and inlet header to an outlet of the inlet header and into the plurality ...