(19)

(11)

EP 0 379 485 A1

(12)

(43) Date of publication: 01.08.1990 Bulletin 1990/31 (21) Application number: 88903319.0 (22) Date of filing: 22.04.1988

(51) International Patent Classification (IPC):  A01N 27/ 00( . ) (86) International application number: PCT/GB1988/000306 (87) International publication number: WO 1988/008249 (03.11.1988 Gazette 1988/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 29.04.1987 GB 19870010177 (71) Applicant: EVEREST-TODD, Selwyn Lincolnshire LN7 6LG (GB)	(72) Inventor: EVEREST-TODD, Selwyn Lincolnshire LN7 6LG (GB) (74) Representative: Oulton, Richard John  R.J. OULTON & CO., First Floor, Pearl Assurance Buildings, Land of Green Ginger Hull, Humberside HU1 2EA Hull, Humberside HU1 2EA (GB)