(19)

(11)

EP 4 419 757 A1

(12)

(43) Date of publication: 28.08.2024 Bulletin 2024/35 (21) Application number: 22854774.1 (22) Date of filing: 24.10.2022

(51) International Patent Classification (IPC):  E04B 1/19(2006.01) (52) Cooperative Patent Classification (CPC): E04B 2001/1936; E04B 1/19; E04B 2001/1975 (86) International application number: PCT/US2022/047613 (87) International publication number: WO 2023/069785 (27.04.2023 Gazette 2023/17)

(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: 24.10.2021 US 202163271203 P 31.10.2021 US 202163274004 P 19.09.2022 US 202263408091 P (71) Applicant: Van Egmond, Jan Willem Charleston, WV 25304 (US)	(72) Inventor: Van Egmond, Jan Willem Charleston, WV 25304 (US) (74) Representative: HGF  HGF Limited 1 City Walk Leeds LS11 9DX Leeds LS11 9DX (GB)