(19)

(11)

EP 4 162 123 A1

(12)

(43) Date of publication: 12.04.2023 Bulletin 2023/15 (21) Application number: 21729036.0 (22) Date of filing: 01.06.2021

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) E04C 2/292(2006.01) E04B 2/92(2006.01) (52) Cooperative Patent Classification (CPC): E04F 13/0876; E04B 2/92; E04C 2/292; E04C 2/324; E04C 2002/004; E04F 13/12 (86) International application number: PCT/IB2021/054794 (87) International publication number: WO 2021/245550 (09.12.2021 Gazette 2021/49)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 03.06.2020 WO PCT/IB2020/055240 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: GRASS, Jean-Claude 67150 Erstein (FR) CATALOGNA, Eric 55170 Cousances-les-Forges (FR) BOURCY, Elise 4000 Liège (BE) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra Immeuble Le Cézanne 93200 Saint-Denis 93200 Saint-Denis (FR)