(19)

(11)

EP 1 377 693 A2

(12)

(88) Date of publication A3: 06.02.2003 (43) Date of publication: 07.01.2004 Bulletin 2004/02 (21) Application number: 02718329.2 (22) Date of filing: 05.04.2002

(51) International Patent Classification (IPC)7: C25B 9/00, C25B 3/00, C25B 3/12, B01J 19/00 (86) International application number: PCT/GB2002/001608 (87) International publication number: WO 2002/083988 (24.10.2002 Gazette 2002/43)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 12.04.2001 GB 0109239 31.10.2001 GB 0126182 (71) Applicant: AstraZeneca AB 151 85 Södertälje (SE)	(72) Inventors: SHAW, John, Edward, Andrew West Drayton,Middlesex UB7 7AL (GB) SHUTE, Richard, E. Macclesfield (GB) (74) Representative: Leaman, Keith et al fJ Cleveland,40-43 Chancery Lane London WC2A 1JQ London WC2A 1JQ (GB)