(19)

(11)

EP 4 739 968 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24725519.3 (22) Date of filing: 17.05.2024

(51) International Patent Classification (IPC):  F27D 17/00(2025.01) F27B 9/28(2006.01) C21D 1/46(2006.01) C23C 2/02(2006.01) F27B 9/06(2006.01) C21D 1/74(2006.01) C23C 2/00(2006.01) C23C 2/40(2006.01) (52) Cooperative Patent Classification (CPC): C23C 2/003; C23C 2/0038; C23C 2/0224; C23C 2/40; C23C 2/50; C23C 2/0222; F27B 9/28; F27B 9/067; C21D 1/74; C21D 9/60; C21D 9/561; C21D 9/56; F27D 17/10 (86) International application number: PCT/EP2024/063768 (87) International publication number: WO 2025/008106 (09.01.2025 Gazette 2025/02)

(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: 05.07.2023 EP 23183522 (71) Applicant: John Cockerill SA 4100 Seraing (BE)	(72) Inventor: DUBOIS, Michel 4100 BONCELLES (BE) (74) Representative: AWA Benelux  Parc d'affaires Zénobe Gramme - Bât. K Square des Conduites d'Eau 1-2 4020 Liège 4020 Liège (BE)