(19)

(11)

EP 0 259 427 A1

(12)

(43) Date of publication: 16.03.1988 Bulletin 1988/11 (21) Application number: 87901572.0 (22) Date of filing: 06.03.1987

(51) International Patent Classification (IPC):  A01G 31/ 00( . ) (86) International application number: PCT/GB1987/000157 (87) International publication number: WO 1987/005464 (24.09.1987 Gazette 1987/21)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.03.1986 GB 19860005946 (71) Applicant: FISONS plc Ipswich Suffolk IP1 1QH (GB)	(72) Inventor: CHAPLIN, John Henley Ispwich IP6 ORH (GB)