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EP 3 924 537 A1

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(43) Date of publication: 22.12.2021 Bulletin 2021/51 (21) Application number: 20713433.9 (22) Date of filing: 13.02.2020

(51) International Patent Classification (IPC):  C25B 1/46(2006.01) C25B 13/08(2006.01) C25B 9/10(2006.01) H01M 8/1053(2016.01) (52) Cooperative Patent Classification (CPC): C25B 1/46; C25B 9/19; C25B 13/08 (86) International application number: PCT/US2020/018024 (87) International publication number: WO 2020/168023 (20.08.2020 Gazette 2020/34)

(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: 14.02.2019 US 201962805333 P (71) Applicant: The Chemours Company FC, LLC Wilmington, Delaware 19801 (US)

(72) Inventors: PERRY, Randal L. Hockessin, Delaware 19707 (US) UNLU, Murat Newark, Delaware 19713 (US) BRADY, Jack Christopher Fayetteville, North Carolina 28305 (US) EWART, Douglas Glenn Hope Mills, North Carolina 28348 (US) HOPKINS, Timothy Edward Newark, Delaware 19711 (US) LLOYD, Ralph Birchard Fayetteville, North Carolina 28311 (US) MCKEEVER, Mark Robert Mooresville, North Carolina 28117 (US) (74) Representative: Heinemann, Monica et al Abitz & Partner Patentanwälte mbB Arabellastraße 17 81925 München 81925 München (DE)