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:
Jan. 27, 2026
Filed:
Jun. 15, 2021
Novelis Koblenz Gmbh, Koblenz, DE;
Bernd Jacoby, Limburg, DE;
Steven Kirkham, Ransbach-Baumbach, DE;
Fabian Ritz, Ötzingen, DE;
Axel Alexander Maria Smeyers, Heist op den Berg, BE;
Novelis Koblenz GmbH, Koblenz, DE;
Abstract
Described herein is an aluminium alloy multi-layered brazing sheet product for brazing in an inert-gas atmosphere without a flux that includes a core layer made of a 3xxx alloy that includes <0.2 wt. % Mg, and that provides a covering clad layer that includes 2-6 wt. % Si on one or both sides of said 3xxx alloy core layer and a Al—Si brazing clad layer that includes 7-13 wt. % Si positioned between the 3xxx alloy core layer and the covering clad layer, wherein the covering clad layer has a thickness Xand the Al—Si brazing clad layer has a thickness Xand wherein X≥2X. Also described herein is the use of an aluminium alloy multi-layered brazing sheet product in a flux-free controlled atmosphere brazing (CAB) operation to produce a heat exchanger apparatus.