(19)

(11)

EP 1 007 196 A1

(12)

(43) Date of publication: 14.06.2000 Bulletin 2000/24 (21) Application number: 98904278.3 (22) Date of filing: 13.02.1998

(51) International Patent Classification (IPC)7: B01F 3/18, C04B 20/12, C04B 40/00 (86) International application number: PCT/GB9800/457 (87) International publication number: WO 9835/750 (20.08.1998 Gazette 1998/33)

(84) Designated Contracting States: BE CH DE ES FR GB IT LI NL (30) Priority: 15.02.1997 GB 9703195 (71) Applicant: Saitron Limited Manchester M12 6HN (GB)	(72) Inventors: TANTON, Richard E. Yorkshire HU15 1JH (GB) SWAISLAND, Brent Cheshire SK12 1SR (GB) (74) Representative: W.P. Thompson & Co.  Coopers Building,Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)