(19)

(11)

EP 0 814 898 A1

(12)

(43) Date of publication: 07.01.1998 Bulletin 1998/02 (21) Application number: 95934726.0 (22) Date of filing: 23.10.1995

(51) International Patent Classification (IPC):  B01D 67/ 00( . ) B01D 71/ 68( . ) B01D 71/ 52( . ) C08J 9/ 00( . ) (86) International application number: PCT/GB1995/002500 (87) International publication number: WO 1996/027429 (12.09.1996 Gazette 1996/41)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 03.03.1995 GB 19950004251 (71) Applicant: Kalsep Limited Camberley, Surrey, GU15 3DF (GB)	(72) Inventor: WILKES, John, Steven London SW10 0EG (GB) (74) Representative: Lucas, Brian Ronald  Lucas & Co. 135 Westhall Road Warlingham Surrey CR6 9HJ Warlingham Surrey CR6 9HJ (GB)