(19)

(11)

EP 0 750 595 A1

(12)

(43) Date of publication: 02.01.1997 Bulletin 1997/01 (21) Application number: 95913219.0 (22) Date of filing: 17.03.1995

(51) International Patent Classification (IPC):  C04B 26/ 16( . ) E01C 7/ 30( . ) (86) International application number: PCT/GB1995/000581 (87) International publication number: WO 1995/025076 (21.09.1995 Gazette 1995/40)

(84) Designated Contracting States: BE DE FR GB NL SE (30) Priority: 17.03.1994 JP 19940085204 14.06.1994 JP 19940165728 20.07.1994 JP 19940198902 20.07.1994 JP 19940198903 20.01.1995 GB 19950001115 (71) Applicant: Potter, Graham D. Wigston, Leicester LE18 1BD (GB)	(72) Inventors: POTTER, Graham D. Wigston, Leicester LE18 1BD (GB) SHIMIZU, Fumio Eniwa-shi, Hokkaido (JP) (74) Representative: SERJEANTS  25, The Crescent King Street Leicester, LE1 6RX Leicester, LE1 6RX (GB)