(19)

(11)

EP 4 181 977 A1

(12)

(43) Date of publication: 24.05.2023 Bulletin 2023/21 (21) Application number: 21746384.3 (22) Date of filing: 12.07.2021

(51) International Patent Classification (IPC):  A61L 9/20(2006.01) F24F 7/003(2021.01) B01D 46/52(2006.01) B01D 46/10(2006.01) F24F 1/0071(2019.01) F24F 8/22(2021.01) (52) Cooperative Patent Classification (CPC): A61L 9/20; A61L 2209/111; B01D 46/10; B01D 46/521; F16L 47/10; F24F 1/0071; F24F 7/003; F24F 8/22 (86) International application number: PCT/EP2021/069259 (87) International publication number: WO 2022/013119 (20.01.2022 Gazette 2022/03)

(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: 16.07.2020 GB 202010969 (71) Applicant: Respired Limited London, WC1V 6LJ (GB)	(72) Inventor: HENDRIKSEN, Henrik Victor 9000 Aalborg (DK) (74) Representative: Andreasen, Søren Laursen Vasegaard  Tropa ApS Aagade 97, 1st Floor 8370 Hadsten 8370 Hadsten (DK)