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(11)

EP 4 522 304 A1

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(43) Date of publication: 19.03.2025 Bulletin 2025/12 (21) Application number: 23804356.6 (22) Date of filing: 12.05.2023

(51) International Patent Classification (IPC):  B01D 29/60(2006.01) C02F 1/00(2023.01) B01D 27/14(2006.01) C02F 1/44(2023.01) (52) Cooperative Patent Classification (CPC): B01D 27/14; B01D 35/143; B01D 37/046; B01D 2201/54; B01D 2201/56; B01D 37/043; B01D 35/12; C02F 1/008; C02F 9/20; C02F 2209/001; C02F 2209/003; C02F 2209/008; C02F 2209/006; C02F 2209/445; C02F 2209/40; C02F 2209/10; C02F 2201/006; C02F 1/283; C02F 1/42; C02F 1/441 (86) International application number: PCT/US2023/022129 (87) International publication number: WO 2023/220431 (16.11.2023 Gazette 2023/46)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 13.05.2022 US 202263341902 P 09.02.2023 US 202318166865 22.03.2023 US 202318124920 (71) Applicant: Cloud Water Filter, LLC San Diego, California 92116 (US)

(72) Inventors: MARSDEN, Douglas Marblehead, Massachusetts 01945 (US) PANASYUK, Andrew A. Somerville, Massachusetts 02145 (US) MCDUFFEE, Michael Gloucester, Massachusetts 01930 (US) SENGER, Marc Halliwell Plymouth, Massachusetts 02360 (US) BECK, Benjamin J Boston, Massachusetts 02116 (US) ZVAIFLER, Benjamin San Diego, California 92116 (US) (74) Representative: Epping - Hermann - Fischer  Patentanwaltsgesellschaft mbH Schloßschmidstraße 5 80639 München 80639 München (DE)