(19)

(11)

EP 0 334 869 A1

(12)

(43) Date of publication: 04.10.1989 Bulletin 1989/40 (21) Application number: 87907797.0 (22) Date of filing: 02.12.1987

(51) International Patent Classification (IPC):  C12M 1/ 40( . ) B01F 11/ 00( . ) C12M 3/ 06( . ) B01D 65/ 08( . ) C12M 1/ 12( . ) (86) International application number: PCT/GB1987/000864 (87) International publication number: WO 1988/004318 (16.06.1988 Gazette 1988/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 02.12.1986 GB 19860028724 (71) Applicant: BELLHOUSE TECHNOLOGY LIMITED Abingdon, Oxford OX 14 1DY (GB)	(72) Inventors: BELLHOUSE, Brian, John Islip Oxfordshire OX5 2SQ (GB) KNOWLES, Christopher, J. Kent CT2 8NR (GB) WYATT, Jeremy, Michael Folkestone Kent CT20 3ED (GB) (74) Representative: Jackson, Peter Arthur, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)