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(11)

EP 4 409 060 A1

(12)

(43) Date of publication: 07.08.2024 Bulletin 2024/32 (21) Application number: 22800102.0 (22) Date of filing: 28.09.2022

(51) International Patent Classification (IPC):  D01F 2/00(2006.01) D01F 1/06(2006.01) D06P 3/66(2006.01) D03D 15/54(2021.01) D01F 1/10(2006.01) D06P 1/22(2006.01) D03D 15/225(2021.01) (52) Cooperative Patent Classification (CPC): D01F 2/00; D01F 1/10; D03D 15/225; D03D 15/54; D03D 1/00; D10B 2501/04 (86) International application number: PCT/EP2022/076890 (87) International publication number: WO 2023/052380 (06.04.2023 Gazette 2023/14)

(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: 28.09.2021 EP 21199580 (71) Applicant: Lenzing Aktiengesellschaft 4860 Lenzing (AT)	(72) Inventors: ÖZTÜRK, Hale Bahar 4860 Lenzing (AT) ULRICH, Julia 5303 Thalgau (AT) MAIER, Ramona Anja 4863 Seewalchen (AT) (74) Representative: Schwarz & Partner Patentanwälte GmbH  Patentanwälte Wipplingerstraße 30 1010 Wien 1010 Wien (AT)