(19)

(11)

EP 0 753 078 A1

(12)

(43) Date of publication: 15.01.1997 Bulletin 1997/03 (21) Application number: 95911411.0 (22) Date of filing: 17.03.1995

(51) International Patent Classification (IPC):  C22B 3/ 24( . ) C22B 11/ 00( . ) C22B 3/ 36( . ) (86) International application number: PCT/GB1995/000578 (87) International publication number: WO 1995/027085 (12.10.1995 Gazette 1995/43)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (30) Priority: 30.03.1994 GB 19940006279 (71) Applicant: ZENECA LIMITED London W1Y 6LN (GB)	(72) Inventors: DALTON, Raymond, Frederick Cheadle Hulme Cheshire SK8 7PL (GB) COSTA, Maria-Clara P-9000 Funchal (PT) (74) Representative: Revell, Christopher  ZENECA Specialties, Intellectual Property Group, PO Box 42, Hexagon House Blackley, Manchester, M9 8ZS Blackley, Manchester, M9 8ZS (GB)