(19)

(11)

EP 2 356 475 A1

(12)

(43) Date of publication: 17.08.2011 Bulletin 2011/33 (21) Application number: 09824037.7 (22) Date of filing: 23.10.2009

(51) International Patent Classification (IPC):  G01R 31/02(2006.01) (86) International application number: PCT/US2009/061779 (87) International publication number: WO 2010/051224 (06.05.2010 Gazette 2010/18)

(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 SM TR (30) Priority: 31.10.2008 US 262664 31.10.2008 US 262717 (71) Applicant: Howard University Washington, DC 20059 (US)	(72) Inventor: KIM, Charles, J. Annandale Virginia 22003 (US) (74) Representative: Schumacher & Willsau  Patentanwaltsgesellschaft mbH Nymphenburger Straße 42 D-80335 München D-80335 München (DE)