(19)

(11)

EP 1 631 692 A1

(12)

(43) Date of publication: 08.03.2006 Bulletin 2006/10 (21) Application number: 04735594.6 (22) Date of filing: 01.06.2004

(51) International Patent Classification (IPC):  C22C 5/06(1974.07) (86) International application number: PCT/GB2004/002317 (87) International publication number: WO 2004/106567 (09.12.2004 Gazette 2004/50)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 03.06.2003 GB 0312693 (71) Applicant: Middlesex Silver Co. Limited London N11 1QS (GB)	(72) Inventor: JOHNS, Peter Gammon Watford, Hertfordshire WD1 3BQ (GB) (74) Representative: Lucas, Phillip Brian  Lucas & Co. 135 Westhall Road GB-Warlingham, Surrey CR6 9HJ GB-Warlingham, Surrey CR6 9HJ (GB)