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(11)

EP 2 004 961 A1

(12)

(43) Date of publication: 24.12.2008 Bulletin 2008/52 (21) Application number: 07732216.2 (22) Date of filing: 30.03.2007

(51) International Patent Classification (IPC):  F01N 3/01(2006.01) F01N 3/033(2006.01) F01N 3/031(2006.01) F01N 3/022(2006.01) F01N 3/037(2006.01) (86) International application number: PCT/GB2007/001162 (87) International publication number: WO 2007/113504 (11.10.2007 Gazette 2007/41)

(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: 30.03.2006 GB 0606410 (71) Applicant: Per-Tec Limited Manchester M13 9PL (GB)	(72) Inventor: KUKLA, Peter Cheshire CH3 9NH (GB) (74) Representative: Hawkins, Richard Dudley et al Keltie Fleet Place House 2 Fleet Place London EC4M 7ET 2 Fleet Place London EC4M 7ET (GB)