(19)

(11)

EP 0 464 193 A1

(12)

(43) Date of publication: 08.01.1992 Bulletin 1992/02 (21) Application number: 91903732.0 (22) Date of filing: 29.01.1991

(51) International Patent Classification (IPC):  A01C 3/ 00( . ) C05F 3/ 00( . ) C02F 1/ 52( . ) (86) International application number: PCT/AU1991/000032 (87) International publication number: WO 1991/011393 (08.08.1991 Gazette 1991/18)

(84) Designated Contracting States: DK GB NL (30) Priority: 29.01.1990 AU 19900008343 (71) Applicant: FITZPATRICK, Gregory Percival Wellard, W.A. 6170 (US)	(72) Inventor: FITZPATRICK, Gregory Percival Wellard, W.A. 6170 (US) (74) Representative: Perry, Robert Edward  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)