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EP 4 121 584 A1

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(43) Date of publication: 25.01.2023 Bulletin 2023/04 (21) Application number: 21710332.4 (22) Date of filing: 12.03.2021

(51) International Patent Classification (IPC):  D01F 2/00(2006.01) D06M 11/11(2006.01) D06M 11/50(2006.01) D21C 9/02(2006.01) D01F 2/06(2006.01) D06M 11/34(2006.01) D06M 13/184(2006.01) D21C 9/10(2006.01) (52) Cooperative Patent Classification (CPC): D01F 2/00; D01F 2/06; D01D 1/02; D06M 11/34; D06M 11/50; D06M 11/11; D06M 13/184; D06M 13/188; D06M 13/207; D06M 2101/06; D06L 4/50; D06L 4/10; D21C 9/02; D21H 13/08; D21C 9/163; D21C 9/153; D21C 3/04 (86) International application number: PCT/EP2021/056406 (87) International publication number: WO 2021/185704 (23.09.2021 Gazette 2021/38)

(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: 16.03.2020 EP 20163367 (71) Applicant: Re:NewCell AB 114 36 Stockholm (SE)

(72) Inventors: LINDSTRÖM, Mikael 181 66 Lidingö (SE) HENRIKSSON, Gunnar 170 62 Solna (SE) TRAN CARLSTRÖM, Amy 681 37 Kristinehamn (SE) FOUGNER, Kajsa 663 41 Hammarö (SE) BÖRJESON, Lennart 663 92 Hammarö (SE) KÄLLÉN, Lennart 667 32 Forshaga (SE) MANSOOR, Zaheer Ahmad 681 54 Kristinehamn (SE) SJÖGREN, Tobias 681 52 Kristinehamn (SE) KALDÉUS, Tahani 112 28 Stockholm (SE) (74) Representative: Ström & Gulliksson AB  Box 5275 102 46 Stockholm 102 46 Stockholm (SE)