(19)

(11)

EP 4 824 830 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24904699.6 (22) Date of filing: 10.12.2024

(51) International Patent Classification (IPC):  H01B 1/22(2006.01) H10N 30/093(2023.01) H10N 30/097(2023.01) (52) Cooperative Patent Classification (CPC): H05K 2203/1131; H05K 3/32; B22F 1/054; B22F 1/056; B22F 7/064; B22F 1/102; B22F 1/107; B22F 1/052; H10W 72/325; H10W 72/354; H10W 72/352; H10W 72/07331; H10W 72/013 (86) International application number: PCT/US2024/059286 (87) International publication number: WO 2025/128503 (19.06.2025 Gazette 2025/25)

(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: 14.12.2023 US 202363609899 P (71) Applicant: Celanese Mercury Holdings Inc. Wilmington, DE 19803 (US)	(72) Inventors: OZAWA, Kazutaka Wilmington, Delaware 19803 (US) ROSENFELD, Henry Wilmington, Delaware 19803 (US) NAKAMOTO, Aya Wilmington, Delaware 19803 (US) FUKUI, Yushi Wilmington, Delaware 19803 (US) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)