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(11)

EP 4 352 368 A1

(12)

(43) Date of publication: 17.04.2024 Bulletin 2024/16 (21) Application number: 22793460.1 (22) Date of filing: 21.09.2022

(51) International Patent Classification (IPC):  F04F 1/02(2006.01) F04F 1/10(2006.01) F17C 5/06(2006.01) F04F 1/06(2006.01) C25B 1/04(2021.01) (52) Cooperative Patent Classification (CPC): F04F 1/02; F04F 1/06; F04F 1/10; C25B 1/04; F17C 5/06; F17C 9/00; F17C 2221/012; F17C 2223/0123; F17C 2223/033; F17C 2225/0123; F17C 2225/036; F17C 2227/0192; F17C 2250/043; F17C 2265/063; F17C 2270/0139 (86) International application number: PCT/IB2022/058904 (87) International publication number: WO 2024/047390 (07.03.2024 Gazette 2024/10)

(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: 31.08.2022 LV 220071 (71) Applicant: Ventspils Augstskola Ventspils 3600 (LV)	(72) Inventors: BEZRUKOVS, Valerijs LV-3601 Ventspils (LV) BEZRUKOVS, Vladislavs LV-3601 Ventspils (LV) BEZRUKOVS, Deniss LV-1010 Riga (LV) KONUHOVA, Marina LV-1021 Riga (LV) BERZINS, Agris LV-1035 Riga (LV) (74) Representative: Vitina, Maruta et al Agency TRIA ROBIT P.O. Box 22 1010 Riga 1010 Riga (LV)