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(11)

EP 4 816 577 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24809687.7 (22) Date of filing: 21.11.2024

(51) International Patent Classification (IPC):  C22C 38/44(2006.01) C22C 38/50(2006.01) C22C 38/04(2006.01) B01J 19/02(2006.01) C22C 38/48(2006.01) C22C 38/02(2006.01) C22C 38/00(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/02; C22C 38/04; C22C 38/48; C22C 38/50; C22C 38/44; C22C 38/001; B01J 19/02 (86) International application number: PCT/EP2024/083162 (87) International publication number: WO 2025/114136 (05.06.2025 Gazette 2025/23)

(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: 29.11.2023 EP 23213144 (71) Applicant: CASALE SA 6900 Lugano (CH)	(72) Inventor: MARRONE, Leonardo 21020 Mercallo (VA) (IT) (74) Representative: M. Zardi & Co S.A.  Via G. B. Pioda, 6 6900 Lugano 6900 Lugano (CH)