(19)

(11)

EP 2 665 877 A1

(12)

(43) Date of publication: 27.11.2013 Bulletin 2013/48 (21) Application number: 11805776.9 (22) Date of filing: 16.12.2011

(51) International Patent Classification (IPC):  E04C 2/292(2006.01) F24J 2/04(2006.01) E04C 2/52(2006.01) H01L 35/00(2006.01) (86) International application number: PCT/EP2011/006380 (87) International publication number: WO 2012/097844 (26.07.2012 Gazette 2012/30)

(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: 18.01.2011 EP 11000352 (71) Applicant: Tata Steel UK Ltd London SW1P 4WY (GB)	(72) Inventor: KHAN, Ahsan NL-1951 JZ Velsen-Noord (NL) (74) Representative: Blauw, Frans Gerard  Tata Steel Nederland Technology BV Group Intellectual Property Services P.O. Box 10000 1970 CA IJmuiden 1970 CA IJmuiden (NL)