(19)

(11)

EP 1 383 957 A1

(12)

(43) Date of publication: 28.01.2004 Bulletin 2004/05 (21) Application number: 02720212.6 (22) Date of filing: 12.04.2002

(51) International Patent Classification (IPC)7: D21F 11/00 (86) International application number: PCT/GB2002/001720 (87) International publication number: WO 2002/088464 (07.11.2002 Gazette 2002/45)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 01.05.2001 GB 0110616 11.05.2001 GB 0111680 (71) Applicant: J R CROMPTON LIMITED Manchester M3 3JZ (GB)	(72) Inventor: ROSE, John, Edward Chorley PR6 8TX,Lancashire (GB) (74) Representative: Atkinson, Peter Birch et al MARKS & CLERK,Sussex House,83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)