(19)

(11)

EP 4 551 740 A1

(12)

(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 23834988.0 (22) Date of filing: 05.07.2023

(51) International Patent Classification (IPC):  C25B 15/02(2021.01) C25B 9/19(2021.01) C25B 1/04(2021.01) (52) Cooperative Patent Classification (CPC): C25B 1/04; C25B 9/19; C25B 15/00; Y02E 60/36 (86) International application number: PCT/DK2023/050180 (87) International publication number: WO 2024/008262 (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: 06.07.2022 DK PA202200651 (71) Applicant: Stiesdahl Hydrogen A/S 7323 Give (DK)	(72) Inventor: STIESDAL, Henrik 5000 Odense C (DK) (74) Representative: Medenwaldt, Robin  Tropa ApS Aagade 97, 1st Floor 8370 Hadsten 8370 Hadsten (DK)