(19)

(11)

EP 4 037 814 A1

(12)

(43) Date of publication: 10.08.2022 Bulletin 2022/32 (21) Application number: 20872962.4 (22) Date of filing: 02.10.2020

(51) International Patent Classification (IPC):  B01D 71/78(2006.01) B01D 71/82(2006.01) B01D 71/80(2006.01) B01D 69/12(2006.01) (52) Cooperative Patent Classification (CPC): C08J 7/18; C08J 2323/06; B01D 63/10; B01D 69/125; B01D 2323/30; B01D 71/26; B01D 67/0093; B01D 2323/38; B01D 2323/345; B01D 71/52; B01D 61/02; B01D 61/14 (86) International application number: PCT/IB2020/059236 (87) International publication number: WO 2021/064652 (08.04.2021 Gazette 2021/14)

(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: 02.10.2019 AU 2019903701 02.10.2019 AU 2019903703 01.04.2020 AU 2020901007 10.08.2020 AU 2020902821 (71) Applicant: Hydroxsys Holdings Limited Parnell, Auckland 1052 (NZ)

(72) Inventors: GIFFORD, Dylan Townshend Hastings, 4180 (NZ) MILLS, Sophie Jayne Auckland, 0622 (NZ) PASCOE, Gordon Brett Hamilton, 3210 (NZ) RANAWEERA, Chathuni Duleesha Auckland, 1041 (NZ) WHEELWRIGHT, Walt Auckland, 1072 (NZ) (74) Representative: Ribeiro, James Michael  Withers & Rogers LLP 2 London Bridge London SE1 9RA London SE1 9RA (GB)