(19)

(11)

EP 4 247 997 A1

(12)

(43) Date of publication: 27.09.2023 Bulletin 2023/39 (21) Application number: 20828667.4 (22) Date of filing: 23.11.2020

(51) International Patent Classification (IPC):  C25B 1/04(2021.01) C25B 15/08(2006.01) C25B 9/17(2021.01) C25B 11/02(2021.01) (52) Cooperative Patent Classification (CPC): C25B 1/04; C25B 9/07; C25B 11/03; C25B 9/21; C25B 13/02; C25B 9/13 (86) International application number: PCT/IB2020/061035 (87) International publication number: WO 2022/106874 (27.05.2022 Gazette 2022/21)

(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 (71) Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL) 1015 Lausanne (CH)	(72) Inventors: PSALTIS, Demetri 1028 Preverenges (CH) HOSSEINI HASHEMI, Seyyed Mohammad 8910 Affoltern Am Albis (CH) HADIKHANI, Pooria 1028 Preverenges (CH) SCHENK, Steven Alexandre 1205 Genève (CH) (74) Representative: Byrne, Declan  André Roland SA IP Attorneys & Services Avenue Collonges 21 1004 Lausanne 1004 Lausanne (CH)