(19)

(11)

EP 1 794 335 A1

(12)

(43) Date of publication: 13.06.2007 Bulletin 2007/24 (21) Application number: 05805095.6 (22) Date of filing: 23.09.2005

(51) International Patent Classification (IPC):  C22C 9/00(2006.01) C22C 5/08(2006.01) C22C 1/03(2006.01) (86) International application number: PCT/GB2005/050163 (87) International publication number: WO 2006/032933 (30.03.2006 Gazette 2006/13)

(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: 23.09.2004 GB 0421179 27.04.2005 GB 0508501 (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  Lucas & Co. 135 Westhall Road GB-Warlingham, Surrey CR6 9HJ GB-Warlingham, Surrey CR6 9HJ (GB)