(19)

(11)

EP 4 577 684 A2

(12)

(88) Date of publication A3: 02.08.2024 (43) Date of publication: 02.07.2025 Bulletin 2025/27 (21) Application number: 23776197.8 (22) Date of filing: 24.08.2023

(51) International Patent Classification (IPC):  C23C 18/12(2006.01) C25B 11/093(2021.01) C25B 11/052(2021.01) C25B 11/053(2021.01) (52) Cooperative Patent Classification (CPC): C25B 11/052; C25B 11/053; C25B 11/093; C23C 18/1295; C23C 18/1216; C25B 1/46; C25B 1/265; C25B 1/26; C25B 11/063; C25B 11/089; C25B 11/097 (86) International application number: PCT/US2023/072842 (87) International publication number: WO 2024/044701 (29.02.2024 Gazette 2024/09)

(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 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: 24.08.2022 US 202263400668 P (71) Applicant: Olin Corporation St. Louis, MO 63105 (US)	(72) Inventors: DIFRANCO, Dino Clayton, Missouri 63105 (US) CAWLFIELD, David Clayton, Missouri 63105 (US) BODDIE, Theresa Clayton, Missouri 63105 (US) WHITFIELD, Guy Clayton, Missouri 63105 (US) (74) Representative: Greaves Brewster LLP  Copa House Station Road Cheddar, Somerset BS27 3AH Cheddar, Somerset BS27 3AH (GB)