(19)

(11)

EP 1 609 007 A1

(12)

(43) Date of publication: 28.12.2005 Bulletin 2005/52 (21) Application number: 04709865.2 (22) Date of filing: 10.02.2004

(51) International Patent Classification (IPC)7: G02B 6/00 (86) International application number: PCT/US2004/003886 (87) International publication number: WO 2004/074889 (02.09.2004 Gazette 2004/36)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 17.02.2003 EP 03075453 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventors: PESENTI, Marcella M., Segrate 20090 (IT) TASSONI, Luigi Milano 20129 (IT) (74) Representative: Riccardi, Elisa et al Porta, Checcacci & Associati S.p.A. Via Trebbia, 20 20135 Milano 20135 Milano (IT)