(19)

(11)

EP 4 529 574 A2

(12)

(88) Date of publication A3: 18.04.2024 (43) Date of publication: 02.04.2025 Bulletin 2025/14 (21) Application number: 23723157.6 (22) Date of filing: 25.04.2023

(51) International Patent Classification (IPC):  C25B 9/19(2021.01) C25B 13/02(2006.01) C25B 9/23(2021.01) C25B 1/02(2006.01) (52) Cooperative Patent Classification (CPC): C25B 9/19; C25B 9/23; C25B 13/02; C25B 1/02; Y02E 60/50 (86) International application number: PCT/EP2023/060809 (87) International publication number: WO 2023/227313 (30.11.2023 Gazette 2023/48)

(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: 23.05.2022 DK PA202200483 14.06.2022 DK PA202200562 (71) Applicant: Metharc ApS 2100 Copenhagen (DK)	(72) Inventor: GILLICK, Stuart Robert 2100 Copenhagen (DK) (74) Representative: Larsen & Birkeholm A/S  Banegårdspladsen 1 1570 Copenhagen V 1570 Copenhagen V (DK)