(19)

(11)

EP 1 569 878 A1

(12)

(43) Date of publication: 07.09.2005 Bulletin 2005/36 (21) Application number: 03735848.8 (22) Date of filing: 30.06.2003

(51) International Patent Classification (IPC)7: C04B 33/24, C04B 33/28, C04B 33/13 (86) International application number: PCT/GB2003/002813 (87) International publication number: WO 2004/002919 (08.01.2004 Gazette 2004/02)

(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 PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 28.06.2002 GB 0215037 (71) Applicant: Ceram Technology Limited ST4 7LQ (GB)	(72) Inventors: CARTLIDGE, David Newcastle under Lyme, ST5 4BN (GB) HANCOCK, Peter Samuel Stoke-on-Trent, ST7 1UX (GB) (74) Representative: Walker, Neville Daniel Alan  ipconsult 1C Station Hill Cookham Berkshire SL6 9BT Berkshire SL6 9BT (GB)