(19)

(11)

EP 1 015 708 A1

(12)

(43) Date of publication: 05.07.2000 Bulletin 2000/27 (21) Application number: 99935652.0 (22) Date of filing: 15.07.1999

(51) International Patent Classification (IPC)7: E04B 1/682, E04B 1/68 (86) International application number: PCT/US9916/181 (87) International publication number: WO 0004/247 (27.01.2000 Gazette 2000/04)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 16.07.1998 US 116926 (71) Applicant: Westec Barrier Technologies, Inc. Fenton, MO 63026 (US)	(72) Inventors: ESTES, Michael, J. Kirkwood, MO 63122 (US) NEW, Dean, W. Crosby, TX 77532 (US) (74) Representative: Weydert, Robert et al Dennemeyer & Associates S.A.P.O. Box 1502 1015 Luxembourg 1015 Luxembourg (LU)