(19)

(11)

EP 0 915 948 A1

(12)

(43) Date of publication: 19.05.1999 Bulletin 1999/20 (21) Application number: 97936680.0 (22) Date of filing: 29.07.1997

(51) International Patent Classification (IPC):  C11D 1/ 825( . ) C11D 1/ 66( . ) C11D 1/ 722( . ) C11D 3/ 20( . ) C11D 1/ 72( . ) (86) International application number: PCT/EP1997/004164 (87) International publication number: WO 1998/004660 (05.02.1998 Gazette 1998/05)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 29.07.1996 GB 19960015882 13.05.1997 GB 19970009585 (71) Applicants: Agency Design Services Limited Salford M7 4AS (GB) Armstrong, John Somerville Portstewart, County Londonderry BT55 7JF (GB)	(72) Inventor: ARMSTRONG, John, Somerville County Londonderry BT55 7JF (GB) (74) Representative: O'Connell, Maura, Dr., et al  F. R. Kelly & Co., 9, University Street Belfast, BT7 1NA Northern Ireland Belfast, BT7 1NA Northern Ireland (GB)