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(11)

EP 1 242 850 A1

(12)

(43) Date of publication: 25.09.2002 Bulletin 2002/39 (21) Application number: 00954025.3 (22) Date of filing: 10.08.2000

(51) International Patent Classification (IPC)7: G03B 21/132 (86) International application number: PCT/US0022/154 (87) International publication number: WO 0104/8552 (05.07.2001 Gazette 2001/27)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 27.12.1999 US 472257 (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventors: BALDWIN, Dwight, G. Saint Paul, MN 55133-3427 (US) FESLER, Robert, M. Saint Paul, MN 55133-3427 (US) NELSON, Jeffrey, M. Saint Paul, MN 55133-3427 (US) (74) Representative: Hilleringmann, Jochen, Dipl.-Ing. et al Patentanwältevon Kreisler-Selting-Werner,Bahnhofsvorplatz 1 (Deichmannhaus) 50667 Köln 50667 Köln (DE)