(19)

(11)

EP 0 581 876 A1

(12)

(43) Date of publication: 09.02.1994 Bulletin 1994/06 (21) Application number: 92911970.0 (22) Date of filing: 22.04.1992

(51) International Patent Classification (IPC):  B05B 7/ 04( . ) B05B 9/ 08( . ) B67D 7/ 74( . ) B01F 15/ 04( . ) B67D 7/ 42( . ) (86) International application number: PCT/US1992/003337 (87) International publication number: WO 1992/019530 (12.11.1992 Gazette 1992/28)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 24.04.1991 US 19910690505 25.09.1991 US 19910765576 (71) Applicant: ECOLAB INCORPORATED Saint Paul, MN 55102 (US)	(72) Inventors: SPRIGGS, John, R. Minneapolis, MN 55419 (US) DECKER, James, D. Apple Valley, MN 55124 (US) COPELAND, James, L. Burnsville, MN 55337 (US) THOMAS, John, E. River Falls, WI 54022 (US) (74) Representative: Belcher, Simon James, et al  Urquhart-Dykes & Lord Tower House Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)