(19)

(11)

EP 4 798 866 A1

(12)

(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24799128.4 (22) Date of filing: 17.10.2024

(51) International Patent Classification (IPC):  F04D 29/02(2006.01) F04D 29/053(2006.01) C21D 1/78(2006.01) F01D 5/02(2006.01) C21D 9/28(2006.01) F04D 25/00(2006.01) C21D 1/25(2006.01) C21D 1/26(2006.01) C21D 6/00(2006.01) C21D 8/00(2006.01) F01D 5/00(2006.01) F04D 29/00(2006.01) (52) Cooperative Patent Classification (CPC): C21D 6/00; C21D 6/004; C21D 9/28; C21D 1/25; C21D 1/26; C21D 1/78; C21D 2221/00; F04D 29/053; F04D 29/023; F05D 2230/41; F05D 2300/507; F01D 5/02; C21D 8/00 (86) International application number: PCT/EP2024/025307 (87) International publication number: WO 2025/087559 (01.05.2025 Gazette 2025/18)

(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: GE KH MA MD TN (30) Priority: 27.10.2023 EP 23315400 (71) Applicant: Cryostar SAS 68220 Hesingue (FR)	(72) Inventor: MURAD-BICKARD, Anny 68220 Hesingue (FR) (74) Representative: Reuß, Stephanie  Linde GmbH Intellectual Property EMEA Dr.-Carl-von-Linde-Straße 6-14 82049 Pullach 82049 Pullach (DE)