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(11)

EP 2 459 345 A2

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(88) Date of publication A3: 28.04.2011 (43) Date of publication: 06.06.2012 Bulletin 2012/23 (21) Application number: 10806804.0 (22) Date of filing: 08.07.2010

(51) International Patent Classification (IPC):  B24D 13/14(2006.01) B24D 3/28(2006.01) B24B 37/04(2012.01) B24D 3/34(2006.01) (86) International application number: PCT/US2010/041275 (87) International publication number: WO 2011/016941 (10.02.2011 Gazette 2011/06)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 27.07.2009 US 509707 (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventors: MCARDLE, James, L. Saint Paul, Minnesota 55133-3427 (US) HAWKINS, Ann, M. Saint Paul, Minnesota 55133-3427 (US) QUADE, William, C. Saint Paul, Minnesota 55133-3427 (US) KUBIK, Martin Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)