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(11)

EP 4 680 787 A1

(12)

(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 23927823.7 (22) Date of filing: 12.12.2023

(51) International Patent Classification (IPC):  C25C 3/24(2006.01) C25C 3/08(2006.01) C25C 3/02(2006.01) C25C 7/00(2006.01) (52) Cooperative Patent Classification (CPC): C25C 3/02; C25C 3/24; C25C 3/08; C25C 3/04; C25C 7/005 (86) International application number: PCT/US2023/083612 (87) International publication number: WO 2024/191485 (19.09.2024 Gazette 2024/38)

(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: KH MA MD TN (30) Priority: 14.03.2023 US 202363490057 P (71) Applicant: Arconic Technologies LLC Pittsburgh, PA 15212-5858 (US)	(72) Inventors: MYDLAND, Brent L. Gibsonia, Pennsylvania 15044 (US) WILLIAMS, Edward M. Apollo, Pennsylvania 15613 (US) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)