(19)

(11)

EP 1 169 269 A1

(12)

(43) Date of publication: 09.01.2002 Bulletin 2002/02 (21) Application number: 00914297.7 (22) Date of filing: 31.03.2000

(51) International Patent Classification (IPC)7: C02F 1/68, C02F 1/26 (86) International application number: PCT/GB0001/251 (87) International publication number: WO 0058/225 (05.10.2000 Gazette 2000/40)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 31.03.1999 GB 9907485 (71) Applicant: THE UNIVERSITY COURT OF THE UNIVERSITY OF EDINBURGH Edinburgh EH8 9YL (GB)	(72) Inventors: TASKER, Peter, Anthony Edinburgh (GB) WHITE, David, James Altrincham, Cheshire (GB) (74) Representative: Manaton, Ross Timothy  JY & GW Johnson, Kingsbourne House, 229-231 High Holborn London WC1V 7DP London WC1V 7DP (GB)