(19)

(11)

EP 1 366 338 A1

(12)

(43) Date of publication: 03.12.2003 Bulletin 2003/49 (21) Application number: 02703720.9 (22) Date of filing: 28.02.2002

(51) International Patent Classification (IPC)7: F42B 7/04, F42B 12/74, C22C 12/00, C22C 13/02 (86) International application number: PCT/GB0200/918 (87) International publication number: WO 0206/8897 (06.09.2002 Gazette 2002/36)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 28.02.2001 GB 0104949 (71) Applicant: Lyalvale Limited Lichfield,Staffordshire WS13 8XA (GB)	(72) Inventor: PHILLIPS, Arthur, Hugh, Godfrey Tonbridge,Kent TN11 8PJ (GB) (74) Representative: Stonehouse, Sidney William  Barker Brettell 138 Hagley RoadEdgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)