(19)

(11)

EP 4 739 839 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 25766299.9 (22) Date of filing: 17.09.2025

(51) International Patent Classification (IPC):  D21H 17/37(2006.01) D21H 17/70(2006.01) D21H 21/20(2006.01) D21H 17/38(2006.01) D21H 21/18(2006.01) (52) Cooperative Patent Classification (CPC): D21H 21/18; D21H 21/20; D21H 17/375; D21H 17/38; D21H 17/70 (86) International application number: PCT/EP2025/076577 (87) International publication number: WO 2026/062078 (26.03.2026 Gazette 2026/13)

(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 LA MA MD TN (30) Priority: 18.09.2024 EP 24201139 (71) Applicant: SNF Group 42160 Andrézieux-Bouthéon (FR)	(72) Inventor: The designation of the inventor has not yet been filed  () (74) Representative: Ipsilon  Le Contemporain 50 Chemin de la Bruyère 69574 Dardilly Cedex 69574 Dardilly Cedex (FR)