(19)

(11)

EP 4 824 326 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24821896.8 (22) Date of filing: 10.12.2024

(51) International Patent Classification (IPC):  C25B 3/03(2021.01) C25B 3/26(2021.01) C25B 11/052(2021.01) C25B 11/056(2021.01) C25B 11/077(2021.01) C25B 3/23(2021.01) C25B 11/032(2021.01) C25B 11/053(2021.01) C25B 11/065(2021.01) C25B 11/093(2021.01) (52) Cooperative Patent Classification (CPC): C25B 11/032; C25B 11/053; C25B 11/052; C25B 11/056; C25B 11/065; C25B 11/093; C25B 11/077; C25B 3/23; C25B 3/26; C25B 3/03 (86) International application number: PCT/EP2024/085545 (87) International publication number: WO 2025/125250 (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 23217362 (71) Applicant: Industrie De Nora S.P.A. 20134 Milano (IT)	(72) Inventors: BARONE, Riccardo 20134 Milan (IT) GALLIANI, Daniela 20134 Milan (IT) RIILLO, Luca 20134 Milan (IT) (74) Representative: Reitstötter Kinzebach  Patentanwälte Sternwartstraße 4 81679 München 81679 München (DE)