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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.:

US 12649965 B1

PDFFull Text
Date of Patent:
Jun. 09, 2026

Filed:

May. 16, 2022

Stainless steel foil with flattening film

Applicant:

Nippon Steel Chemical & Material Co., Ltd., Tokyo, JP;

Inventors:

Shouhei Kawai, Tokyo, JP;

Hiroto Unno, Tokyo, JP;

Jun Nakatsuka, Tokyo, JP;

Assignee:

NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Megha M Gaitonde

Int. Cl.
CPC ...
C22C 38/52 (2006.01); B22F 3/15 (2006.01); B22F 3/17 (2006.01); B22F 3/24 (2006.01); B22F 9/08 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01); C22C 38/50 (2006.01);
U.S. Cl.
CPC ...
C22C 38/52 (2013.01); B22F 3/15 (2013.01); B22F 3/17 (2013.01); B22F 3/24 (2013.01); B22F 9/082 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/22 (2013.01); C22C 38/28 (2013.01); C22C 38/50 (2013.01); B22F 2003/248 (2013.01); B22F 2009/0824 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01);
Abstract

Stainless steel foil with a flattening film reducing the number of pits present on the stainless steel foil surface and free of cracks occurring at the flattening film, that is, stainless steel foil with a flattening film, comprising the stainless steel foil having a composition comprising stainless steel constituents and having a balance comprised of Fe and impurities, inclusions having particle diameter 2.00 μm or more comprising AlO: 30 mass % or less and MgO: 10 mass % or less with respect to a total mass of the particle diameter 2.00 μm or more inclusions, among the particle diameter 2.00 μm or more inclusions, the number of inclusions having particle diameter more than 5.00 μm present on the surface being 20/cmor less, and having a sheet thickness of 5.0 μm or more and 100.0 μm or less and the flattening film having a film thickness of 0.3 μm or more and 5.0 μm or less on at least one surface of the stainless steel foil.

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