(19)

(11)

EP 1 309 424 A2

(12)

(88) Date of publication A3: 23.05.2002 (43) Date of publication: 14.05.2003 Bulletin 2003/20 (21) Application number: 01962017.8 (22) Date of filing: 09.08.2001

(51) International Patent Classification (IPC)7: B24D 11/00, B24B 37/04 (86) International application number: PCT/US0125/006 (87) International publication number: WO 0201/4018 (21.02.2002 Gazette 2002/08)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 14.08.2000 JP 2000245793 (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventors: AMANO, Takashi Kanagawa 240-0052 (JP) WATASE, Toshihiko Tokyo 206-0803 (JP) IMAMURA, Kengo Ebina City,Kanagawa 243-0432 (JP) (74) Representative: von Kreisler, Alek, Dipl.-Chem.  Patentanwälte,von Kreisler-Selting-Werner,Bahnhofsvorplatz 1 (Deichmannhaus) 50667 Köln 50667 Köln (DE)