(19)

(11)

EP 0 404 865 A1

(12)

(43) Date of publication: 02.01.1991 Bulletin 1991/01 (21) Application number: 89909029.0 (22) Date of filing: 31.07.1989

(51) International Patent Classification (IPC):  C11D 11/ 04( . ) C11D 17/ 00( . ) (86) International application number: PCT/GB1989/000873 (87) International publication number: WO 1990/001536 (22.02.1990 Gazette 1990/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 05.08.1988 GB 19880018613 (71) Applicant: PATERSON, ZOCHONIS (U.K.) LIMITED Manchester, M1 6LU (GB)	(72) Inventors: MADEN, John Hepworth Huddersfield HD7 7HZ (GB) LOUDIADIS, Lycourgos Cheshire WA15 0EW (GB) (74) Representative: Low, Peter John, et al  Wilson, Gunn, M'Caw & Co., 41-51 Royal Exchange, Cross Street Manchester, M2 7BD Manchester, M2 7BD (GB)