(19)

(11)

EP 4 771 210 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24858817.0 (22) Date of filing: 27.08.2024

(51) International Patent Classification (IPC):  C25B 9/60(2021.01) (52) Cooperative Patent Classification (CPC): C25B 9/65; C25B 9/05; C25B 1/04; Y02E 60/36 (86) International application number: PCT/DK2024/050200 (87) International publication number: WO 2025/045323 (06.03.2025 Gazette 2025/10)

(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: GE KH MA MD TN (30) Priority: 28.08.2023 DK PA202330169 (71) Applicant: Stiesdahl Hydrogen A/S 7323 Give (DK)	(72) Inventors: KROGH, Thomas Holm 8765 Klovborg (DK) NAVNTOFT, Claus Besser 7470 Karup (DK) NIELSEN, Jørgen Vig 6000 Kolding (DK) (74) Representative: Medenwaldt, Robin  Tropa ApS Aagade 97, 1st Floor 8370 Hadsten 8370 Hadsten (DK)