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EP 4 387 943 A1

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(43) Date of publication: 26.06.2024 Bulletin 2024/26 (21) Application number: 22857179.0 (22) Date of filing: 17.08.2022

(51) International Patent Classification (IPC):  C06B 21/00(2006.01) B22F 1/145(2022.01) C06B 45/30(2006.01) B22F 1/16(2022.01) C06B 33/00(2006.01) C10L 5/40(2006.01) (52) Cooperative Patent Classification (CPC): B22F 1/145; B22F 1/16; C06B 45/30; C06B 21/0033 (86) International application number: PCT/CA2022/051251 (87) International publication number: WO 2023/019357 (23.02.2023 Gazette 2023/08)

(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: 17.08.2021 US 202163234094 P (71) Applicant: Oqab Dietrich Induction Inc. Kitchener ON N2H 1A6 (CA)

(72) Inventors: OQAB, Haroon B. Kitchener, Ontario N2H 1A6 (CA) DIETRICH, George B. Kitchener, Ontario N2H 1A6 (CA) WEN, John Kitchener, Ontario N2H 1A6 (CA) HICKEY, Jean-Pierre Kitchener, Ontario N2H 1A6 (CA) WANG, Anqi Kitchener, Ontario N2H 1A6 (CA) ZHANG, Yiqi Kitchener, Ontario N2H 1A6 (CA) (74) Representative: Humphrey-Evans, Edward John  HEIPS 1 Hawkes CloseWokingham, Berkshire RG41 2SZ 1 Hawkes CloseWokingham, Berkshire RG41 2SZ (GB)