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EP 4 522 785 A2

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(88) Date of publication A3: 06.06.2024 (43) Date of publication: 19.03.2025 Bulletin 2025/12 (21) Application number: 23735802.3 (22) Date of filing: 06.07.2023

(51) International Patent Classification (IPC):  C25B 1/46(2006.01) C25B 11/061(2021.01) C25B 11/052(2021.01) C25B 11/093(2021.01) (52) Cooperative Patent Classification (CPC): C25B 1/46; C25B 11/052; C25B 11/061; C25B 11/093 (86) International application number: PCT/EP2023/068785 (87) International publication number: WO 2024/008895 (11.01.2024 Gazette 2024/02)

(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: KH MA MD TN (30) Priority: 08.07.2022 IT 202200014359 (71) Applicant: Industrie De Nora S.P.A. 20134 Milano (IT)	(72) Inventors: RAMUNNI, Anna 20134 Milan (IT) SALA, Fabio 20134 Milan (IT) (74) Representative: Reitstötter Kinzebach  Patentanwälte Sternwartstraße 4 81679 München 81679 München (DE)