(19)

(11)

EP 4 816 740 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24816915.3 (22) Date of filing: 26.11.2024

(51) International Patent Classification (IPC):  F24F 13/02(2006.01) (52) Cooperative Patent Classification (CPC): F16L 59/145; F24F 13/0263; F24F 2221/30; F24F 13/0245; C09J 129/04; C09J 131/04 (86) International application number: PCT/EP2024/083515 (87) International publication number: WO 2025/114234 (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: 28.11.2023 DK PA202330355 (71) Applicant: Alber Gypsum LLC Farmingdale, New Jersey 07727 (US)	(72) Inventor: ALBÉR, Leif 2860 Søborg (DK) (74) Representative: Larsen & Birkeholm A/S  Bredgade 3, 3rd floor 1260 Copenhagen K 1260 Copenhagen K (DK)