(19)

(11)

EP 3 999 696 A1

(12)

(43) Date of publication: 25.05.2022 Bulletin 2022/21 (21) Application number: 20840960.7 (22) Date of filing: 17.07.2020

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) E04B 1/94(2006.01) E04C 2/296(2006.01) (52) Cooperative Patent Classification (CPC): E04C 2002/004; E04C 2/043; E04C 2/38; E04F 13/04; E04F 13/083; E04F 2201/026 (86) International application number: PCT/US2020/042501 (87) International publication number: WO 2021/011860 (21.01.2021 Gazette 2021/03)

(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 (30) Priority: 17.07.2019 US 201962875238 P (71) Applicant: Certain Teed Gypsum, Inc. Malvern, PA 19355 (US)	(72) Inventors: JENKINS, Robert L. Honey Brook, PA 19344 (US) LOOMIS, Garrett Newton, MA 02465 (US) DUPONT-MADINIER, Kim Somerville, MA 02143 (US) JACOBITES, Brock Northboro, MA 05132 (US) (74) Representative: Murgitroyd & Company  Murgitroyd House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)