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Blank, Method For Manufacturing Structural Member, And Structural Member

Abstract: This blank (20, 20A, 20B, 20C) for hot stamping is provided with a plurality of steel sheets. The plurality of steel sheets are arranged so as to have an annular shape in a plan view of the blank (20, 20A, 20B, 20C), and are bonded to each other. The plurality of steel sheets include steel sheets (21, 22). The first steel sheet (21) has a minimum sheet thickness (tmin). The sheet thickness of the second steel sheet (22) is larger than the sheet thickness (tmin) of the first steel sheet (21). The steel sheets (21, 22) are plated steel sheets that have base steel sheets (21a, 22a) and aluminum-based plating layers (21b, 22b). The adhesion amount (W1) of the plating layer (21b) in the first steel sheet (21) is less than the adhesion amount (W2) of the plating layer (22b) in the second steel sheet (22).

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
12 November 2025
Publication Number
49/2025
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
Parent Application

Applicants

NIPPON STEEL CORPORATION
6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. KIMOTO, Naoki
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. KUBO, Masahiro
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
3. IGUCHI, Keinosuke
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
4. YOSHIDA, Hiroshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
5. IRIKAWA, Hideaki
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
6. FUJITA, Soshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
7. SUZUKI, Yuki
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202517110026-STATEMENT OF UNDERTAKING (FORM 3) [12-11-2025(online)].pdf 2025-11-12
2 202517110026-REQUEST FOR EXAMINATION (FORM-18) [12-11-2025(online)].pdf 2025-11-12
3 202517110026-PROOF OF RIGHT [12-11-2025(online)].pdf 2025-11-12
4 202517110026-POWER OF AUTHORITY [12-11-2025(online)].pdf 2025-11-12
5 202517110026-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [12-11-2025(online)].pdf 2025-11-12
6 202517110026-FORM 18 [12-11-2025(online)].pdf 2025-11-12
7 202517110026-FORM 1 [12-11-2025(online)].pdf 2025-11-12
8 202517110026-FIGURE OF ABSTRACT [12-11-2025(online)].pdf 2025-11-12
9 202517110026-DRAWINGS [12-11-2025(online)].pdf 2025-11-12
10 202517110026-DECLARATION OF INVENTORSHIP (FORM 5) [12-11-2025(online)].pdf 2025-11-12
11 202517110026-COMPLETE SPECIFICATION [12-11-2025(online)].pdf 2025-11-12