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(11)

EP 4 540 426 A1

(12)

(43) Date of publication: 23.04.2025 Bulletin 2025/17 (21) Application number: 23738864.0 (22) Date of filing: 13.06.2023

(51) International Patent Classification (IPC):  C21C 5/52(2006.01) C22B 1/245(2006.01) C21C 7/076(2006.01) F27D 3/18(2006.01) (52) Cooperative Patent Classification (CPC): C21C 5/527; C21C 7/076; F27D 3/18; C22B 1/245; C22B 1/243 (86) International application number: PCT/IB2023/056087 (87) International publication number: WO 2023/242731 (21.12.2023 Gazette 2023/51)

(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: 14.06.2022 IT 202200012584 (71) Applicant: Unicalce S.p.A. 24012 Val Brembilla (BG) (IT)	(72) Inventors: MARRAS, Roberto 24012 VAL BREMBILLA (BG) (IT) MORESCHI, Roberto 24012 VAL BREMBILLA (BG) (IT) (74) Representative: AWA Benelux  Parc d'affaires Zénobe Gramme - Bât. K Square des Conduites d'Eau 1-2 4020 Liège 4020 Liège (BE)