(19)

(11)

EP 1 000 340 A1

(12)

(43) Date of publication: 17.05.2000 Bulletin 2000/20 (21) Application number: 98938452.4 (22) Date of filing: 07.08.1998

(51) International Patent Classification (IPC)7: G01N 19/04, G01N 15/06 (86) International application number: PCT/US9816/482 (87) International publication number: WO 9908/093 (18.02.1999 Gazette 1999/07)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 07.08.1997 GB 9716781 (71) Applicant: S.C. JOHNSON & SON, INC. Racine,Wisconsin 53403 (US)	(72) Inventor: BROWN, Colin W. Milwaukee, WI 53202 (US) (74) Representative: Ruschke, Hans Edvard, Dipl.-Ing. et al Ruschke Hartmann BeckerPienzenauerstrasse 2 81679 München 81679 München (DE)