(19)

(11)

EP 0 912 672 A1

(12)

(43) Date of publication: 06.05.1999 Bulletin 1999/18 (21) Application number: 96940011.0 (22) Date of filing: 29.11.1996

(51) International Patent Classification (IPC):  A61L 12/ 08( . ) C11D 3/ 00( . ) C11D 1/ 90( . ) (86) International application number: PCT/GB1996/002937 (87) International publication number: WO 1997/020019 (05.06.1997 Gazette 1997/24)

(84) Designated Contracting States: DE ES FR GB IE IT NL (30) Priority: 30.11.1995 GB 19950024452 (71) Applicant: Award PLC London EC4A 1NH (GB)	(72) Inventor: HAMILTON, Ronald, Shade Bruntsfield Edimburgh EH9 1BF (GB) (74) Representative: Newell, Campbell, et al  Cruikshank & Fairweather, 19 Royal Exchange Square Glasgow G1 3AE Glasgow G1 3AE (GB)