(19)

(11)

EP 4 267 279 A1

(12)

(43) Date of publication: 01.11.2023 Bulletin 2023/44 (21) Application number: 21865352.5 (22) Date of filing: 22.12.2021

(51) International Patent Classification (IPC):  B01D 53/14(2006.01) F24F 8/50(2021.01) A61L 9/03(2006.01) A61L 9/14(2006.01) A61L 2/24(2006.01) B60H 3/00(2006.01) (52) Cooperative Patent Classification (CPC): B01D 2258/06; B01D 2257/90; B01D 2257/91; B01D 2259/4508; B01D 2259/124; B01D 53/1487; A61L 9/14; A61L 2/24; A61L 9/03 (86) International application number: PCT/FI2021/050907 (87) International publication number: WO 2022/136741 (30.06.2022 Gazette 2022/26)

(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: 23.12.2020 FI 20206372 (71) Applicant: NT Inno Oy 85800 Haapajärvi (FI)	(72) Inventor: TYTÄRNIEMI, Pasi 85800 Haapajärvi (FI) (74) Representative: Kespat Oy  Vasarakatu 23a 40320 Jyväskylä 40320 Jyväskylä (FI)