(19)

(11)

EP 0 649 389 A1

(12)

(43) Date of publication: 26.04.1995 Bulletin 1995/17 (21) Application number: 93913301.0 (22) Date of filing: 04.06.1993

(51) International Patent Classification (IPC):  B01F 3/ 04( . ) C02F 3/ 20( . ) B01F 15/ 00( . ) (86) International application number: PCT/GB1993/001196 (87) International publication number: WO 1993/025484 (23.12.1993 Gazette 1993/30)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 09.06.1992 GB 19920012193 09.06.1992 GB 19920012195 (71) Applicant: LANMARK (WATER) LIMITED Croston, Preston PR5 7RF (GB)	(72) Inventor: ALLISON, William Tarleton, Preston PR4 6BQ (GB) (74) Representative: Brierley, Anthony Paul, et al  Appleyard Lees 15 Clare Road Halifax West Yorkshire HX1 2HY Halifax West Yorkshire HX1 2HY (GB)