(19)

(11)

EP 4 499 987 A1

(12)

(43) Date of publication: 05.02.2025 Bulletin 2025/06 (21) Application number: 23719073.1 (22) Date of filing: 29.03.2023

(51) International Patent Classification (IPC):  F01D 1/36(2006.01) F01D 5/04(2006.01) (52) Cooperative Patent Classification (CPC): F01D 1/36; F01D 5/043 (86) International application number: PCT/IB2023/053129 (87) International publication number: WO 2023/187674 (05.10.2023 Gazette 2023/40)

(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: 30.03.2022 IT 202200006254 (71) Applicant: SF Energy Srl 20025 Legnano (MI) (IT)	(72) Inventor: SALGAROLLO, Stefano 20025 Legnano (MI) (IT) (74) Representative: PGA S.p.A.  Via Mascheroni, 31 20145 Milano 20145 Milano (IT)