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(11)

EP 4 558 651 A2

(12)

(88) Date of publication A3: 11.04.2024 (43) Date of publication: 28.05.2025 Bulletin 2025/22 (21) Application number: 23843926.9 (22) Date of filing: 21.07.2023

(51) International Patent Classification (IPC):  C22B 3/44(2006.01) C01G 53/00(2025.01) C22B 3/08(2006.01) C22B 23/00(2006.01) B09C 1/00(2006.01) C22B 7/00(2006.01) B01J 47/02(2017.01) C22B 3/04(2006.01) C22B 3/00(2006.01) (52) Cooperative Patent Classification (CPC): C22B 23/043; C22B 23/0461; C22B 3/26; C22B 3/42; C22B 26/22; C22B 1/00 (86) International application number: PCT/US2023/070710 (87) International publication number: WO 2024/020548 (25.01.2024 Gazette 2024/04)

(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: 22.07.2022 US 202263391662 P (71) Applicant: Metalplant Public Benefit Corporation Wilmington, Delaware 19802-4447 (US)	(72) Inventors: MATZNER, Eric Jason Wilmington, Delaware 19802-4447 (US) WASSERSON, Laura R. Wilmington, Delaware 19802-4447 (US) (74) Representative: J A Kemp LLP  80 Turnmill Street London EC1M 5QU London EC1M 5QU (GB)