(19)

(11)

EP 4 824 374 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24834502.7 (22) Date of filing: 06.12.2024

(51) International Patent Classification (IPC):  E04F 15/12(2006.01) E04F 15/20(2006.01) E04F 15/18(2006.01) E04F 15/02(2006.01) (52) Cooperative Patent Classification (CPC): E04F 15/203; E04F 15/181; E04F 15/12; E04F 2015/02055 (86) International application number: PCT/US2024/058770 (87) International publication number: WO 2025/128410 (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: 13.12.2023 US 202363609588 P 26.06.2024 US 202418755409 (71) Applicant: UNITED STATES GYPSUM COMPANY Chicago, IL 60661-3676 (US)	(72) Inventor: POSPISIL, Frank Oak Park, Illinois 60304 (US) (74) Representative: Reddie & Grose LLP  The White Chapel Building 10 Whitechapel High Street London E1 8QS London E1 8QS (GB)