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(11)

EP 4 188 582 A1

(12)

(43) Date of publication: 07.06.2023 Bulletin 2023/23 (21) Application number: 21751859.6 (22) Date of filing: 27.07.2021

(51) International Patent Classification (IPC):  B01D 53/02(2006.01) B01D 53/32(2006.01) B01D 53/14(2006.01) (52) Cooperative Patent Classification (CPC): B01D 53/025; B01D 53/1456; B01D 53/32; B01D 2256/18; B01D 2257/11; B01D 2257/2066; B01D 2258/0216; B01D 2259/818; Y02C 20/30 (86) International application number: PCT/GB2021/051923 (87) International publication number: WO 2022/023725 (03.02.2022 Gazette 2022/05)

(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: 28.07.2020 GB 202011649 04.09.2020 US 202017012430 (71) Applicant: Edwards Limited Burgess Hill, Sussex RH15 9TW (GB)

(72) Inventors: SEELEY, Andrew James Somerset BS21 6TH (GB) COTTLE, Stephen Bruce Somerset BS21 6TH (GB) CONDON, Neil Burgess Hill Sussex RH15 9TW (GB) BAILEY, Christopher Mark Burgess Hill Sussex RH15 9TW (GB) DEAN, Julian Richard Burgess Hill Sussex RH15 9TW (GB) GREENWOOD, Joanne Rachel Burgess Hill Sussex RH15 9TW (GB) DUNBAR, Zachary William Sanborn, New York 14132 (US) (74) Representative: Ford, Alexander  Edwards Limited Innovation Drive Burgess Hill, West Sussex RH15 9TW Burgess Hill, West Sussex RH15 9TW (GB)