(19)

(11)

EP 4 132 887 A1

(12)

(43) Date of publication: 15.02.2023 Bulletin 2023/07 (21) Application number: 21718667.5 (22) Date of filing: 07.04.2021

(51) International Patent Classification (IPC):  C02F 3/28(1980.01) C12M 1/107(1990.01) C12M 1/00(1980.01) C02F 11/04(1980.01) C12M 1/34(1980.01) C02F 1/44(1980.01) (52) Cooperative Patent Classification (CPC): C02F 2209/03; C02F 2209/42; C02F 2209/40; C02F 11/04; C02F 3/28; C02F 1/444; C02F 2301/046; C12M 21/04; C12M 41/40; C12M 43/08; C12M 29/18; C12M 41/48; Y02E 50/30 (86) International application number: PCT/NL2021/050226 (87) International publication number: WO 2021/206550 (14.10.2021 Gazette 2021/41)

(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: 07.04.2020 NL 1043630 (71) Applicant: Bareau AHPD Octrooibeheer B.V. 8447 GN, Heerenveen (NL)	(72) Inventor: ZAGT, Christiaan Emanuel 8447 DR Heerenveen (NL) (74) Representative: Arnold & Siedsma  Bezuidenhoutseweg 57 2594 AC The Hague 2594 AC The Hague (NL)