(19)

(11)

EP 0 502 959 A1

(12)

(43) Date of publication: 16.09.1992 Bulletin 1992/38 (21) Application number: 91900569.0 (22) Date of filing: 13.11.1990

(51) International Patent Classification (IPC):  A01N 25/ 10( . ) A01N 41/ 06( . ) A01N 57/ 00( . ) A01N 25/ 00( . ) A01N 47/ 12( . ) A01N 59/ 14( . ) (86) International application number: PCT/US1990/006672 (87) International publication number: WO 1991/007972 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 29.11.1989 US 19890443807 (71) Applicant: S.C. JOHNSON & SON, INC. Racine, WI 53403-5011 (US)	(72) Inventors: DYKSTRA, Siebern Racine, WI 53402 (US) HAINZE, John H. Racine, WI 53402 (US) (74) Representative: Baillie, Iain Cameron, et al  Ladas & Parry Altheimer Eck 2 D-80331 München D-80331 München (DE)