(19)

(11)

EP 0 885 337 A1

(12)

(43) Date of publication: 23.12.1998 Bulletin 1998/52 (21) Application number: 97908819.0 (22) Date of filing: 03.03.1997

(51) International Patent Classification (IPC):  E04B 2/ 74( . ) E04C 3/ 34( . ) E04C 3/ 29( . ) E04C 3/ 36( . ) (86) International application number: PCT/US1997/003277 (87) International publication number: WO 1997/033056 (12.09.1997 Gazette 1997/39)

(84) Designated Contracting States: BE DE DK ES FR GB IT SE (30) Priority: 04.03.1996 US 19960610308 (71) Applicant: NATIONAL GYPSUM COMPANY Charlotte, North Carolina 28211-3498 (US)	(72) Inventor: MENCHETTI, Robert, J. Buffalo, NY 14223 (US) (74) Representative: UEXKÜLL & STOLBERG  Patentanwälte Beselerstrasse 4 22607 Hamburg 22607 Hamburg (DE)