(19)

(11)

EP 0 706 679 A1

(12)

(43) Date of publication: 17.04.1996 Bulletin 1996/16 (21) Application number: 94912006.0 (22) Date of filing: 29.03.1994

(51) International Patent Classification (IPC):  G03G 9/ 09( . ) (86) International application number: PCT/GB1994/000655 (87) International publication number: WO 1995/000885 (05.01.1995 Gazette 1995/02)

(84) Designated Contracting States: BE DE FR GB IE IT NL (30) Priority: 28.06.1993 GB 19930013274 (71) Applicant: ZENECA LIMITED London W1Y 6LN (GB)	(72) Inventor: CAMPBELL, James, Stanley Whitefield Manchester M45 6TX (GB) (74) Representative: Pugsley, Roger Graham, et al  Intellectual Property Group Zeneca Specialties P.O. Box 42 Hexagon House Blackley Manchester M9 8ZS Manchester M9 8ZS (GB)