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EP 0 826 084 A1

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(43) Date of publication: 04.03.1998 Bulletin 1998/10 (21) Application number: 96909274.0 (22) Date of filing: 09.04.1996

(51) International Patent Classification (IPC):  C09B 62/ 503( . ) C09B 62/ 44( . ) C09B 62/ 513( . ) D06P 1/ 38( . ) D06P 1/ 645( . ) C09B 62/ 04( . ) D06P 3/ 66( . ) C09B 62/ 08( . ) C09B 62/ 51( . ) D06P 1/ 00( . ) D06P 1/ 52( . ) D06P 3/ 60( . ) C09B 62/ 507( . ) (86) International application number: PCT/GB1996/000867 (87) International publication number: WO 1996/035012 (07.11.1996 Gazette 1996/49)

(84) Designated Contracting States: DE GB IT (30) Priority: 06.05.1995 GB 19950009295 25.05.1995 GB 19950010687 (60) Divisional application: 00104363.7 / 1013818 (71) Applicant: ZENECA LIMITED London W1Y 6LN (GB)

(72) Inventors: HUTCHINGS, Michael, Gordon Bury, Lancashire BL8 4PD (GB) BRENNAN, Colin, Michael Bury, Lancashire BL9 9AD (GB) TALLANT, Neil, Anthony Manchester M45 6TE (GB) SHAWCROSS, Andrew, Paul Manchester M28 2GJ (GB) PATEL, Prakash Huddersfield HD3 3AX (GB) EBENEZER, Warren, James Stockport SK4 3AP (GB) (74) Representative: Mayall, John  Intellectual Property Group Zeneca Specialties P.O. Box 42 Hexagon House Blackley Manchester M9 8ZS Manchester M9 8ZS (GB)