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(11)

EP 4 499 894 A1

(12)

(43) Date of publication: 05.02.2025 Bulletin 2025/06 (21) Application number: 23725933.8 (22) Date of filing: 25.04.2023

(51) International Patent Classification (IPC):  C25B 1/23(2021.01) C25B 3/07(2021.01) C25B 9/23(2021.01) C25B 15/023(2021.01) C25B 3/03(2021.01) C25B 3/26(2021.01) C25B 11/032(2021.01) C25B 15/025(2021.01) (52) Cooperative Patent Classification (CPC): C25B 1/23; C25B 3/03; C25B 3/07; C25B 3/26; C25B 9/23; C25B 11/032; C25B 15/023; C25B 15/025 (86) International application number: PCT/US2023/066147 (87) International publication number: WO 2023/220520 (16.11.2023 Gazette 2023/46)

(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: 09.05.2022 EP 22172254 (71) Applicant: Siemens Energy Global GmbH & Co. KG 81739 München (DE)	(72) Inventors: SAHIN, Baran 81673 München (DE) SIMON, Elfriede 80639 München (DE) FLEISCHER, Maximilian 85635 Höhenkirchen (DE) MAGORI, Erhard 85622 Feldkirchen (DE) (74) Representative: Isarpatent  Patent- und Rechtsanwälte Barth Hassa Peckmann & Partner mbB Friedrichstraße 31 80801 München 80801 München (DE)