(19)

(11)

EP 0 943 038 A1

(12)

(43) Date of publication: 22.09.1999 Bulletin 1999/38 (21) Application number: 97949770.0 (22) Date of filing: 05.12.1997

(51) International Patent Classification (IPC):  E03D 9/ 03( . ) (86) International application number: PCT/US1997/022354 (87) International publication number: WO 1998/024989 (11.06.1998 Gazette 1998/23)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 05.12.1996 GB 19960025330 (71) Applicant: S.C. JOHNSON & SON, INC. Racine, Wisconsin 53403 (US)	(72) Inventor: THOMPSON, Guy, R. Hampshire GU14 0PH (GB) (74) Representative: Jones, Alan John, et al  CARPMAELS & RANSFORD 43 Bloomsbury Square London, WC1A 2RA London, WC1A 2RA (GB)