(19)

(11)

EP 2 569 457 A1

(12)

(43) Date of publication: 20.03.2013 Bulletin 2013/12 (21) Application number: 11727774.9 (22) Date of filing: 13.05.2011

(51) International Patent Classification (IPC):  C22C 26/00(2006.01) C04B 35/00(2006.01) B22F 3/15(2006.01) E21B 10/00(2006.01) (86) International application number: PCT/IB2011/052115 (87) International publication number: WO 2011/141898 (17.11.2011 Gazette 2011/46)

(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: 14.05.2010 US 334966 P 14.05.2010 GB 201008093 (71) Applicant: ELEMENT SIX ABRASIVES S.A. 2763 Luxembourg (LU)	(72) Inventors: NAIDOO, Kaveshini 1559 Springs (ZA) SITHEBE, Humphrey Samkelo Lungisani 1559 Springs (ZA) (74) Representative: Reeve, Anna Elizabeth et al Element Six Limited 3rd Floor, Building 4, Chiswick Park 566 Chiswick High Road GB-London W4 5YE GB-London W4 5YE (GB)