(19)

(11)

EP 4 341 469 A1

(12)

(43) Date of publication: 27.03.2024 Bulletin 2024/13 (21) Application number: 22726501.4 (22) Date of filing: 20.05.2022

(51) International Patent Classification (IPC):  D01D 5/08(2006.01) D01F 8/06(2006.01) D03D 1/00(2006.01) D01F 6/46(2006.01) D01D 5/253(2006.01) (52) Cooperative Patent Classification (CPC): D01F 6/46; D01D 5/08; D01F 8/06; D01D 5/253; D03D 15/527; D03D 15/33; D10B 2101/122; D10B 2401/021; D03D 15/60; D03D 15/283; D10B 2321/02; D10B 2331/02; D10B 2331/04 (86) International application number: PCT/GB2022/051277 (87) International publication number: WO 2022/243700 (24.11.2022 Gazette 2022/47)

(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: 20.05.2021 GB 202107272 (71) Applicant: Amphibio Ltd London WC2H 9JQ (GB)	(72) Inventor: KAMEI, Jun London SW11 3RF (GB) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham, West Midlands B16 8QQ Birmingham, West Midlands B16 8QQ (GB)