(19)

(11)

EP 4 308 751 A2

(12)

(88) Date of publication A3: 19.01.2023 (43) Date of publication: 24.01.2024 Bulletin 2024/04 (21) Application number: 22717730.0 (22) Date of filing: 17.03.2022

(51) International Patent Classification (IPC):  C25B 3/01(2021.01) C25B 15/027(2021.01) C25B 15/023(2021.01) C25B 15/031(2021.01) (52) Cooperative Patent Classification (CPC): C25B 15/027; C25B 15/023; C25B 15/031; C25B 15/08; C25B 9/77; C25B 9/75; C25B 9/70; C25B 3/03 (86) International application number: PCT/EP2022/057017 (87) International publication number: WO 2022/195023 (22.09.2022 Gazette 2022/38)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.03.2021 DE 102021106890 (71) Applicant: ELECTROCHAEA GMBH 82152 Planegg (DE)	(72) Inventors: HAFENBRADL, Doris 82152 Planegg (DE) ERBEN, Johannes 82152 Planegg (DE) PATEL, Nitant 82152 Planegg (DE) RODRIGO, Jose 82152 Planegg (DE) (74) Representative: Fleuchaus & Gallo Partnerschaft mbB  Steinerstraße 15/A 81369 München 81369 München (DE)