(19)

(11)

EP 1 062 034 A1

(12)

(43) Date of publication: 27.12.2000 Bulletin 2000/52 (21) Application number: 99910489.6 (22) Date of filing: 15.03.1999

(51) International Patent Classification (IPC)7: B01J 19/00, B01J 13/02, G03F 7/00, G09F 3/00 (86) International application number: PCT/GB9900/762 (87) International publication number: WO 9947/254 (23.09.1999 Gazette 1999/38)

(84) Designated Contracting States: CH DE DK FR GB IE LI NL SE (30) Priority: 13.03.1998 GB 9805508 13.03.1998 GB 9805510 13.03.1998 GB 9805512 (71) Applicant: CENTRAL RESEARCH LABORATORIES LIMITED Hayes,Middlesex, UB3 1HH (GB)	(72) Inventor: CORLESS, Anthony, Robert Pound Farm Lane,Ash GU12 6EG (GB) (74) Representative: Leaman, Keith  QED I.P. Services Limited,Dawley Road Hayes,Middlesex UB3 1HH Hayes,Middlesex UB3 1HH (GB)