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EP 4 739 838 A1

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(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24740948.5 (22) Date of filing: 04.07.2024

(51) International Patent Classification (IPC):  D21H 17/02(2006.01) D21H 17/24(2006.01) D21H 19/14(2006.01) D21H 21/16(2006.01) D21H 17/21(2006.01) D21H 17/00(2006.01) D21H 19/34(2006.01) D21H 27/10(2006.01) (52) Cooperative Patent Classification (CPC): D21H 17/02; D21H 17/24; D21H 17/21; D21H 17/72; D21H 19/14; D21H 19/34; D21H 21/16; D21H 27/10 (86) International application number: PCT/FI2024/050374 (87) International publication number: WO 2025/008575 (09.01.2025 Gazette 2025/02)

(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: 04.07.2023 FI 20235790 (71) Applicant: Åbo Akademi 20500 Åbo (FI)	(72) Inventors: KVIKANT, Minette 20500 ÅBO (FI) KOPPOLU, Rajesh 20500 ÅBO (FI) TOIVAKKA, Martti 20500 ÅBO (FI) XU, Chunlin 20500 ÅBO (FI) (74) Representative: Laine IP Oy  Porkkalankatu 24 00180 Helsinki 00180 Helsinki (FI)