(19)

(11)

EP 1 105 628 A1

(12)

(43) Date of publication: 13.06.2001 Bulletin 2001/24 (21) Application number: 99939511.4 (22) Date of filing: 18.08.1999

(51) International Patent Classification (IPC)7: F01N 1/04 (86) International application number: PCT/GB9902/593 (87) International publication number: WO 0011/327 (02.03.2000 Gazette 2000/09)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 19.08.1998 GB 9817973 (71) Applicant: Lancaster Glass Fibre Limited LancasterLancashire LA1 5QP (GB)	(72) Inventors: CLOKEY, Neville, Julian Aldcliffe,Lancs LA1 5BT (GB) BULMER, George, Christopher, Frederick Lancs LA1 5EZ (GB) (74) Representative: Walsh, David Patrick et al Appleyard Lees,15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)