(19)

(11)

EP 1 955 099 A1

(12)

(43) Date of publication: 13.08.2008 Bulletin 2008/33 (21) Application number: 06838447.8 (22) Date of filing: 27.11.2006

(51) International Patent Classification (IPC):  G02B 6/00(2006.01) (86) International application number: PCT/US2006/045482 (87) International publication number: WO 2007/064615 (07.06.2007 Gazette 2007/23)

(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 NL PL PT RO SE SI SK TR (30) Priority: 30.11.2005 EP 05026054 (71) Applicant: 3M Innovative Properties Company St. Paul MN 55133-3427 (US)	(72) Inventors: PESENTI, Marcella L., I-20080 Milano (IT) TASSONI, Luigi, I-20129 Milano (IT) (74) Representative: Hill, Cecilia Ann  Office of Intellectual Property Counsel, 3M Europe S.A./N.V., Hermeslaan 7 1831 Diegem 1831 Diegem (BE)