(19)

(11)

EP 1 474 715 A1

(12)

(43) Date of publication: 10.11.2004 Bulletin 2004/46 (21) Application number: 03703931.0 (22) Date of filing: 21.01.2003

(51) International Patent Classification (IPC)7: G02B 6/38, B24B 19/22, B24D 3/00, G02B 6/25 (86) International application number: PCT/US2003/001765 (87) International publication number: WO 2003/067299 (14.08.2003 Gazette 2003/33)

(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 SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 08.02.2002 JP 2002032675 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: OHISHI, Michihiro Sagamihara, Kanagawa 229-1101 (JP) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 81675 München 81675 München (DE)