(19)

(11)

EP 4 771 115 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24755590.7 (22) Date of filing: 14.08.2024

(51) International Patent Classification (IPC):  C10B 31/02(2006.01) C10B 31/04(2006.01) (52) Cooperative Patent Classification (CPC): C10B 31/04; C10B 31/02 (86) International application number: PCT/EP2024/072951 (87) International publication number: WO 2025/045600 (06.03.2025 Gazette 2025/10)

(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: 28.08.2023 LU 505010 (71) Applicant: Paul Wurth S.A. 1122 Luxembourg (LU)	(72) Inventors: MOLINARI, Alessandro 19017 Riomaggiore (SP) (IT) FAVELLA, Emanuele 16159 Genoa (Ge) (IT) (74) Representative: Office Freylinger  P.O. Box 48 8001 Strassen 8001 Strassen (LU)