The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2025
Filed:
Jul. 31, 2023
Rtx Corporation, Arlington, VA (US);
Shane E. Haydt, Manchester, CT (US);
Brian A. Fisher, West Hartford, CT (US);
RAYTHEON TECHNOLOGIES CORPORATION, Arlington, VA (US);
Abstract
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 of fluid passages from the outlet of the inlet header. The inlet header includes a diffuser structure in fluid communication between the inlet and the outlet, configured to promote even distribution and flow of the chemical milling fluid from the outlet of the inlet header into the plurality of fluid passages.