(19)

(11)

EP 1 815 032 A2

(12)

(88) Date of publication A3: 06.07.2006 (43) Date of publication: 08.08.2007 Bulletin 2007/32 (21) Application number: 05803591.6 (22) Date of filing: 14.11.2005

(51) International Patent Classification (IPC):  C22C 5/08(2006.01) D04B 21/12(2006.01) (86) International application number: PCT/GB2005/050202 (87) International publication number: WO 2006/051338 (18.05.2006 Gazette 2006/20)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 15.11.2004 GB 0425152 (71) Applicant: Middlesex Silver Co. Limited London N11 1QS (GB)	(72) Inventor: JOHNS, Peter Gamon Watford Hertfordshire WD1 3BQ (GB) (74) Representative: Lucas, Brian Ronald et al Lucas & Co. 135 Westhall Road Warlingham Surrey CR6 9HJ Warlingham Surrey CR6 9HJ (GB)