(19)

(11)

EP 4 508 286 A1

(12)

(43) Date of publication: 19.02.2025 Bulletin 2025/08 (21) Application number: 23719726.4 (22) Date of filing: 13.04.2023

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) E04F 13/14(2006.01) (52) Cooperative Patent Classification (CPC): E04F 13/0803; E04F 13/0826; E04F 13/142 (86) International application number: PCT/EP2023/059708 (87) International publication number: WO 2023/198846 (19.10.2023 Gazette 2023/42)

(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: 13.04.2022 GB 202205513 (71) Applicant: Wienerberger Ltd Cheadle Cheshire SK8 3SA (GB)	(72) Inventors: FRANKLIN, Marcus Cheadle Cheshire SK8 3SA (GB) MILLER, Paul Cheadle Cheshire SK8 3SA (GB) (74) Representative: Mewburn Ellis LLP  Aurora Building Counterslip Bristol BS1 6BX Bristol BS1 6BX (GB)