(19)

(11)

EP 2 066 167 A1

(12)

(43) Date of publication: 10.06.2009 Bulletin 2009/24 (21) Application number: 07733488.6 (22) Date of filing: 05.07.2007

(51) International Patent Classification (IPC):  A01C 1/04(2006.01) C05F 17/00(2006.01) C05F 17/02(2006.01) C05F 9/00(2006.01) C05F 9/04(2006.01) (86) International application number: PCT/GB2007/002544 (87) International publication number: WO 2008/029075 (13.03.2008 Gazette 2008/11)

(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 Designated Extension States: AL BA HR MK RS (30) Priority: 07.09.2006 GB 0617547 (71) Applicant: University of Warwick Coventry CV4 8UW (GB)	(72) Inventor: NOBLE, Ralph Warwick CV35 9EF (GB) (74) Representative: Elsy, David  Withers & Rogers LLP Goldings House 2 Hays Lane London SE1 2HW 2 Hays Lane London SE1 2HW (GB)