(19)

(11)

EP 2 125 631 A1

(12)

(43) Date of publication: 02.12.2009 Bulletin 2009/49 (21) Application number: 07824637.8 (22) Date of filing: 20.11.2007

(51) International Patent Classification (IPC):  C02F 1/461(2006.01) (86) International application number: PCT/GB2007/004423 (87) International publication number: WO 2008/062170 (29.05.2008 Gazette 2008/22)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 21.11.2006 GB 0623204 (71) Applicant: Atranova Limited Harston Cambridge CB2 5GG (GB)	(72) Inventors: SIMPSON, Alexander Cheshire CW8 2BH (GB) WILKINS, Paul Cambridgeshire CB2 5GG (GB) (74) Representative: MacDougall, Alan John Shaw  Mathys & Squire LLP 120 Holborn London EC1N 2SQ London EC1N 2SQ (GB)