(19)

(11)

EP 4 393 139 A1

(12)

(43) Date of publication: 03.07.2024 Bulletin 2024/27 (21) Application number: 22768379.4 (22) Date of filing: 22.08.2022

(51) International Patent Classification (IPC):  H04L 67/025(2022.01) (52) Cooperative Patent Classification (CPC): H04L 67/025 (86) International application number: PCT/EP2022/073276 (87) International publication number: WO 2023/025703 (02.03.2023 Gazette 2023/09)

(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: 25.08.2021 EP 21306146 (71) Applicant: Merck Patent GmbH 64293 Darmstadt (DE)	(72) Inventor: GOSSE, Christian 67120 MOLSHEIM (FR) (74) Representative: Merck Patent Association  Merck Patent GmbH 64271 Darmstadt 64271 Darmstadt (DE)