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EP 4 824 296 A1

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(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24828401.0 (22) Date of filing: 14.12.2024

(51) International Patent Classification (IPC):  C21D 1/673(2006.01) B60J 5/00(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) B21D 53/88(2006.01) B21D 22/20(2006.01) C21D 9/46(2006.01) C22C 38/04(2006.01) C22C 38/32(2006.01) (52) Cooperative Patent Classification (CPC): C21D 1/673; B21D 22/208; C21D 9/46; C22C 38/02; C22C 38/04; C22C 38/32; B21D 53/88; B60J 5/0413; C22C 38/22; C22C 38/06 (86) International application number: PCT/EP2024/086420 (87) International publication number: WO 2025/125662 (19.06.2025 Gazette 2025/25)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 15.12.2023 EP 23383304 (71) Applicants: AUTOTECH ENGINEERING S.L. 48340 Amorebieta-Etxano Vizcaya (ES) GESTAMP BIZKAIA, S.A. 48220 Abadiño (Bizkaia) (ES) ES  Gestamp Palencia, S.A. 34210 Dueñas, Palencia (ES) ES  GESTAMP NITRA, S.R.O. 951 41 Luzianky (SK) SK  SOFEDIT S.A.S. 61260 Val-au-Perche (FR) FR

(72) Inventor: PEIDRO, Julio 08013 Barcelona Barcelona (ES) (74) Representative: Bardehle Pagenberg S.L.  Avenida Diagonal 598, 3º, 1ª 08021 Barcelona 08021 Barcelona (ES)