(19)

(11)

EP 2 007 551 A2

(12)

(88) Date of publication A3: 27.12.2007 (43) Date of publication: 31.12.2008 Bulletin 2009/01 (21) Application number: 07760363.7 (22) Date of filing: 10.04.2007

(51) International Patent Classification (IPC):  B24D 11/00(2006.01) B24D 3/00(2006.01) (86) International application number: PCT/US2007/066285 (87) International publication number: WO 2007/121155 (25.10.2007 Gazette 2007/43)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 18.04.2006 US 379087 (71) Applicant: 3M Innovative Properties Company St. Paul MN 55133-3427 (US)	(72) Inventors: ANNEN, Michael J., Saint Paul, Minnesota 55133-3427 (US) KOEHNLE, Gregory A., Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Hill, Cecilia Ann  3M Europe S.A. OIPC Hermeslaan 7 1831 Diegem 1831 Diegem (BE)