(19)

(11)

EP 0 440 659 A1

(12)

(43) Date of publication: 14.08.1991 Bulletin 1991/33 (21) Application number: 89908575.0 (22) Date of filing: 18.07.1989

(51) International Patent Classification (IPC):  A01N 43/ 90( . ) C07D 471/ 04( . ) A01N 47/ 02( . ) C07D 487/ 04( . ) (86) International application number: PCT/US1989/003039 (87) International publication number: WO 1990/001030 (08.02.1990 Gazette 1990/04)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 19.07.1988 US 19880221155 07.04.1989 US 19890335121 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventor: SELBY, Thomas, Paul Wilmington, DE 19808 (US) (74) Representative: Hildyard, Edward Martin, et al  Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)