(19)

(11)

EP 2 176 632 A1

(12)

(43) Date of publication: 21.04.2010 Bulletin 2010/16 (21) Application number: 08788913.5 (22) Date of filing: 23.07.2008

(51) International Patent Classification (IPC):  G01L 1/00(2006.01) G01L 5/00(2006.01) (86) International application number: PCT/IB2008/001911 (87) International publication number: WO 2009/013599 (29.01.2009 Gazette 2009/05)

(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: 23.07.2007 IT PI20070085 (71) Applicant: Scuola Superiore Di Studi Universitari S. Anna 56127 Pisa (IT)	(72) Inventors: PERSICHETTI, Alessandro I-06055 Marsciano Perugia (IT) VECCHI, Fabrizio I-56021 Cascina Pisa (IT) CARROZZA, Maria, Chiara I-56100 Pisa (IT) (74) Representative: Celestino, Marco  ABM Agenzia Brevetti & Marchi Viale G. Pisano, 31 56123 Pisa 56123 Pisa (IT)