(19)

(11)

EP 4 337 809 A1

(12)

(43) Date of publication: 20.03.2024 Bulletin 2024/12 (21) Application number: 22728230.8 (22) Date of filing: 10.05.2022

(51) International Patent Classification (IPC):  C25B 3/07(2021.01) C25B 11/042(2021.01) C25B 11/065(2021.01) C25B 3/25(2021.01) C25B 11/054(2021.01) C25B 11/081(2021.01) (52) Cooperative Patent Classification (CPC): C25B 3/07; C25B 3/25; C25B 11/042; C25B 11/054; C25B 11/065; C25B 11/081 (86) International application number: PCT/EP2022/062530 (87) International publication number: WO 2022/238349 (17.11.2022 Gazette 2022/46)

(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: 12.05.2021 EP 21173455 (71) Applicant: DSM IP Assets B.V. 6411 TE Heerlen (NL)	(72) Inventors: BONRATH, Werner 4303 Kaiseraugst (CH) GOETHEER, Earl Lawrence Vincent 2595 Den Haag (NL) GOY, Roman 4303 Kaiseraugst (CH) LATSUZBAIA, Roman 2595 Den Haag (NL) MEDLOCK, Jonathan, Alan 4303 Kaiseraugst (CH) (74) Representative: dsm-firmenich IP  DSM-Firmenich AG Wurmisweg 576 4303 Kaiseraugst 4303 Kaiseraugst (CH)