(19)

(11)

EP 1 156 990 A1

(12)

(43) Date of publication: 28.11.2001 Bulletin 2001/48 (21) Application number: 00903910.8 (22) Date of filing: 22.02.2000

(51) International Patent Classification (IPC)7: C04B 26/04 (86) International application number: PCT/GB0000/610 (87) International publication number: WO 0050/355 (31.08.2000 Gazette 2000/35)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 25.02.1999 GB 9904279 (71) Applicant: Cairn Holdings (UK) Limited Carrington,Manchester M31 4YR (GB)	(72) Inventor: POLLITT, Clifford, Bruce Warrington,Cheshire WA4 3JU (GB) (74) Representative: Ajello, Michael John et al Urquhart-Dykes & LordGreg's Buildings1 Booth Street Manchester M2 4DU Manchester M2 4DU (GB)