(19)

(11)

EP 1 636 395 A1

(12)

(43) Date of publication: 22.03.2006 Bulletin 2006/12 (21) Application number: 04743013.7 (22) Date of filing: 21.06.2004

(51) International Patent Classification (IPC):  C22C 9/06(1968.09) (86) International application number: PCT/GB2004/002662 (87) International publication number: WO 2004/113578 (29.12.2004 Gazette 2004/53)

(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: 19.06.2003 GB 0314229 (71) Applicant: Langley Alloys Limited Stoke-on-Trent Staffordshire ST4 4ER (GB)	(72) Inventors: TUCK, Clive Daniel Sidney Bramshall, Uttoxeter ST4 4ER (GB) HALLIDAY, Christopher Martin John Nantwich CW5 5EH (GB) (74) Representative: Wightman, David Alexander  Barker Brettell 138 Hagley Road Edgbaston GB-Birmingham B16 9PW GB-Birmingham B16 9PW (GB)