(19)

(11)

EP 3 052 271 A1

(12)

(43) Date of publication: 10.08.2016 Bulletin 2016/32 (21) Application number: 14850723.9 (22) Date of filing: 26.09.2014

(51) International Patent Classification (IPC):  B24D 3/02(2006.01) B24D 7/02(2006.01) (86) International application number: PCT/US2014/057633 (87) International publication number: WO 2015/050781 (09.04.2015 Gazette 2015/14)

(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 RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 04.10.2013 US 201361886815 P (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: VAN, Loc X. Saint Paul, MN 55133-3427 (US) (74) Representative: De Clercq & Partners  Edgard Gevaertdreef 10a 9830 Sint-Martens-Latem 9830 Sint-Martens-Latem (BE)