(19)

(11)

EP 1 608 724 A1

(12)

(43) Date of publication: 28.12.2005 Bulletin 2005/52 (21) Application number: 04718343.9 (22) Date of filing: 08.03.2004

(51) International Patent Classification (IPC)7: C10L 5/44, B01J 20/24 (86) International application number: PCT/GB2004/000962 (87) International publication number: WO 2004/078892 (16.09.2004 Gazette 2004/38)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 07.03.2003 GB 0305191 (71) Applicant: Dainton Limited Ripon HG4 1LG (GB)	(72) Inventor: NUTLAND, Geoffrey Ripon HG4 1LG (GB) (74) Representative: Harrison Goddard Foote  Belgrave Hall Belgrave Street Leeds LS2 8DD Leeds LS2 8DD (GB)