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EP 4 288 619 A1

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(43) Date of publication: 13.12.2023 Bulletin 2023/50 (21) Application number: 21924509.9 (22) Date of filing: 03.02.2021

(51) International Patent Classification (IPC):  E04C 3/04(2006.01) E04B 1/08(2006.01) E04C 3/07(2006.01) E04C 2/34(2006.01) (52) Cooperative Patent Classification (CPC): E04C 3/07; E04C 2/34; E04C 2003/043; E04C 2003/0413; E04C 2003/0465; E04B 5/10; E04B 2001/2472; E04B 2001/249; E04B 2001/2487; E04B 2001/2415; E04C 2/08 (86) International application number: PCT/IB2021/050846 (87) International publication number: WO 2022/167834 (11.08.2022 Gazette 2022/32)

(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 (71) Applicant: Formsteel Technologies Limited Mangere, Auckland, 2022 (NZ)	(72) Inventor: HERD, Simon Anthony New Plymouth, 4312 (NZ) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)