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:
Feb. 10, 2026
Filed:
Apr. 23, 2021
Thyssenkrupp Rasselstein Gmbh, Andernach, DE;
Laura Pörzgen, Neuwied, DE;
Manuel Köhl, Mendig, DE;
Philipp Schmalenbach, Oberlahr, DE;
Burkhard Kaup, Andernach, DE;
thyssenkrupp Rasselstein GmbH, Andernach, DE;
Abstract
A method for producing a steel sheet for packaging includes: cold-rolling a hot-rolled steel sheet made from a steel having a carbon content of 10 to 1000 ppm by weight, the steel of the hot-rolled steel sheet having a predetermined recrystallization temperature (T); heating the cold-rolled steel sheet to a predetermined heating temperature (T), where T≤T, the heating performed at least partially in the presence of a nitrogen donor at least until Tis reached such that when the cold-rolled steel sheet is heated, nitrogen from the nitrogen donor is diffused at least into a near-surface region of the cold-rolled sheet steel and incorporated in the near-surface region, as a result of which the Tin the near-surface region is increased by a value ΔT, where T<T+ΔT. Using this method, high-strength steel sheets having a multilayer microstructure can be produced.