(19)

(11)

EP 2 310 588 A2

(12)

(88) Date of publication A3: 17.12.2009 (43) Date of publication: 20.04.2011 Bulletin 2011/16 (21) Application number: 09732899.1 (22) Date of filing: 01.04.2009

(51) International Patent Classification (IPC):  E04B 1/84(2006.01) E04C 2/02(2006.01) E04B 1/86(2006.01) E04C 2/26(2006.01) (86) International application number: PCT/US2009/039128 (87) International publication number: WO 2009/129051 (22.10.2009 Gazette 2009/43)

(84) Designated Contracting States: 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 SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 18.04.2008 US 106077 30.03.2009 US 414313 (71) Applicant: USG INTERIORS, Inc. Chicago, IL 60661 (US)	(72) Inventors: CAO, Bangii Naperville IL 60565 (US) LAU, Te, Hua Glenview IL 60025 (US) SONG, W., David Lake Forest IL 60045 (US) BROWN, Martin, W. Gurnee IL 60031 (US) MALONE, Curt Naperville IL 60563 (US) (74) Representative: Wallinger, Michael  Wallinger Ricker Schlotter Foerstl Patent- und Rechtsanwälte Zweibrückenstrasse 5-7 80331 München 80331 München (DE)