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(11)

EP 0 909 263 A1

(12)

(43) Date of publication: 21.04.1999 Bulletin 1999/16 (21) Application number: 97932897.0 (22) Date of filing: 24.06.1997

(51) International Patent Classification (IPC):  C04B 35/ 01( . ) C04B 35/ 103( . ) C04B 35/ 58( . ) C04B 35/ 66( . ) C04B 35/ 043( . ) C04B 35/ 48( . ) C04B 35/ 583( . ) (86) International application number: PCT/GB1997/001706 (87) International publication number: WO 1998/001405 (15.01.1998 Gazette 1998/02)

(84) Designated Contracting States: AT BE DE DK ES FI FR GB IT LU NL SE (30) Priority: 05.07.1996 GB 19960014188 (71) Applicants: Foseco International Limited Swindon, Wiltshire SN3 1RE (GB) Koransha Company Limited Arita-machi, Saga-ken 844 (JP)	(72) Inventors: JUMA, Kassim Stafford ST17 4EG (GB) KURITA, Sumihiko Saga-ken 844 (JP) (74) Representative: van Wijk, Alexander Pieter, et al  Burmah Castrol Trading Limited, Group Patents Department, Burmah Castrol House, Pipers Way Swindon, Wiltshire SN3 1RE Swindon, Wiltshire SN3 1RE (GB)