(19)

(11)

EP 1 173 308 A1

(12)

(43) Date of publication: 23.01.2002 Bulletin 2002/04 (21) Application number: 00922017.9 (22) Date of filing: 10.04.2000

(51) International Patent Classification (IPC)7: B24D 7/12, B24B 49/12, B24B 49/14 (86) International application number: PCT/US0009/576 (87) International publication number: WO 0064/634 (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 (30) Priority: 23.04.1999 US 131003 P 10.03.2000 US 522881 (71) Applicant: Saint-Gobain Abrasives, Inc. Worcester, Massachusetts 01615-0138 (US)	(72) Inventor: KINISKY, Thomas, G. Shrewsbury, MA 01545 (US) (74) Representative: Leidescher, Thomas  Zimmermann & Partner, Postfach 33 09 20 80069 München 80069 München (DE)