(19)

(11)

EP 4 816 619 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24816980.7 (22) Date of filing: 29.11.2024

(51) International Patent Classification (IPC):  E03B 3/15(2006.01) E21B 37/00(2006.01) B09C 1/00(2006.01) (52) Cooperative Patent Classification (CPC): E03B 3/15; B09C 1/002 (86) International application number: PCT/EP2024/084146 (87) International publication number: WO 2025/114558 (05.06.2025 Gazette 2025/23)

(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: 30.11.2023 LU 505666 (71) Applicant: Pavlovic, Milos Belgrade, 11090 (RS)	(72) Inventor: Pavlovic, Milos Belgrade, 11090 (RS) (74) Representative: Marks & Clerk LLP  15 Fetter Lane London EC4A 1BW London EC4A 1BW (GB)