(19)

(11)

EP 4 824 217 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24838127.9 (22) Date of filing: 12.12.2024

(51) International Patent Classification (IPC):  C11D 1/08(2006.01) C11D 3/20(2006.01) C23F 14/02(2006.01) C11D 1/83(2006.01) C11D 3/30(2006.01) F28G 9/00(2006.01) (52) Cooperative Patent Classification (CPC): C11D 1/08; C11D 1/83; C11D 3/30; C11D 3/2075; C23F 14/02; C02F 2305/04; C02F 2303/22; C02F 5/10; C02F 2101/32 (86) International application number: PCT/US2024/059845 (87) International publication number: WO 2025/128870 (19.06.2025 Gazette 2025/25)

(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: GE KH MA MD TN (30) Priority: 12.12.2023 US 202363608910 P (71) Applicant: BL TECHNOLOGIES, Inc. Minnetonka MN 55343 (US)	(72) Inventors: BUDHATHOKI, Mahesh Minnetonka, MN 55343 (US) MESKERS, Donald Minnetonka, MN 55343 (US) (74) Representative: Greenwoods  Queens House 55-56 Lincoln's Inn Fields London WC2A 3LJ London WC2A 3LJ (GB)