(19)

(11)

EP 4 515 004 A1

(12)

(43) Date of publication: 05.03.2025 Bulletin 2025/10 (21) Application number: 22727450.3 (22) Date of filing: 19.05.2022

(51) International Patent Classification (IPC):  C21C 5/46(2006.01) F27D 1/12(2006.01) F28D 1/047(2006.01) F28D 7/00(2006.01) F27B 3/24(2006.01) F27D 9/00(2006.01) F28D 1/06(2006.01) F28D 7/08(2006.01) (52) Cooperative Patent Classification (CPC): C21C 5/4646; F27D 1/12; F27D 9/00; F27D 2009/0002; F27D 2009/001; F27D 2009/0013; F27D 2009/0018; F27D 2009/0021; F27B 3/24; F28D 1/06; F28D 1/047; F28D 2021/0057 (86) International application number: PCT/IB2022/054665 (87) International publication number: WO 2023/209427 (02.11.2023 Gazette 2023/44)

(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: 28.04.2022 ZA 202204684 (71) Applicant: Greyling, Frederik Petrus 1050 Middelburg (ZA)	(72) Inventor: Greyling, Frederik Petrus 1050 Middelburg (ZA) (74) Representative: Maiwald GmbH  Elisenhof Elisenstraße 3 80335 München 80335 München (DE)