(19)

(11)

EP 1 207 820 A1

(12)

(43) Date of publication: 29.05.2002 Bulletin 2002/22 (21) Application number: 00954735.7 (22) Date of filing: 18.08.2000

(51) International Patent Classification (IPC)7: A61F 2/36 (86) International application number: PCT/GB0003/221 (87) International publication number: WO 0113/824 (01.03.2001 Gazette 2001/09)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.08.1999 GB 9919810 (71) Applicants: UNIVERSITY COLLEGE LONDON London WC1E 6BT (GB) Walker, Peter Stanley New York, NY 10003-7183 (US)	(72) Inventor: Walker, Peter Stanley,The Cooper Union Res. New York, NY 1000 (US) (74) Representative: Weitzel, David Stanley  Brookes Batchellor102-108 Clerkenwell Road London EC1M 5SA London EC1M 5SA (GB)