(19)

(11)

EP 2 247 963 A1

(12)

(43) Date of publication: 10.11.2010 Bulletin 2010/45 (21) Application number: 08843655.5 (22) Date of filing: 28.10.2008

(51) International Patent Classification (IPC):  G01T 1/24(2006.01) (86) International application number: PCT/US2008/081462 (87) International publication number: WO 2009/058782 (07.05.2009 Gazette 2009/19)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 28.10.2007 US 983212 P 27.10.2008 US 259276 (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventor: DAVIS, Anthony Los Alamos New Mexico 87544 (US) (74) Representative: Vossius & Partner  P.O. Box 86 07 67 81634 München 81634 München (DE)