(19)

(11)

EP 2 651 602 A1

(12)

(43) Date of publication: 23.10.2013 Bulletin 2013/43 (21) Application number: 11849118.2 (22) Date of filing: 02.12.2011

(51) International Patent Classification (IPC):  B24D 3/02(2006.01) B24D 18/00(2006.01) B24D 13/02(2006.01) (86) International application number: PCT/US2011/063008 (87) International publication number: WO 2012/082396 (21.06.2012 Gazette 2012/25)

(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 (30) Priority: 14.12.2010 US 422760 P (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventor: RAMAL, Francisco T., Jr. 13181-900 Sumaré São Paulo (BR) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)