(19)

(11)

EP 1 175 279 A1

(12)

(43) Date of publication: 30.01.2002 Bulletin 2002/05 (21) Application number: 00928264.1 (22) Date of filing: 20.04.2000

(51) International Patent Classification (IPC)7: B24B 7/24, B24D 3/28, B24D 3/34, B24D 7/06 (86) International application number: PCT/US0010/747 (87) International publication number: WO 0064/630 (02.11.2000 Gazette 2000/44)

(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: 23.04.1999 US 130797 P (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventor: WOO, Edward, J. Saint Paul, MN 55133-3427 (US) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 81675 München 81675 München (DE)