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(11)

EP 2 409 143 A1

(12)

(43) Date of publication: 25.01.2012 Bulletin 2012/04 (21) Application number: 09841991.4 (22) Date of filing: 18.03.2009

(51) International Patent Classification (IPC):  G01N 27/83(2006.01) G01L 1/00(2006.01) G01R 33/12(2006.01) G01N 27/82(2006.01) (86) International application number: PCT/US2009/001690 (87) International publication number: WO 2010/107413 (23.09.2010 Gazette 2010/38)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR (71) Applicant: Texas Research International, Inc. Austin, TX 78733-6201 (US)	(72) Inventor: FORSYTH, David, Sean Austin TX 78738 (US) (74) Representative: Maggs, Michael Norman et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)