(19)

(11)

EP 2 688 858 A1

(12)

(43) Date of publication: 29.01.2014 Bulletin 2014/05 (21) Application number: 12714117.4 (22) Date of filing: 22.03.2012

(51) International Patent Classification (IPC):  C04B 41/89(2006.01) F01D 5/28(2006.01) (86) International application number: PCT/US2012/030174 (87) International publication number: WO 2012/129431 (27.09.2012 Gazette 2012/39)

(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: 23.03.2011 US 201161466556 P (71) Applicant: Rolls-Royce Corporation Indianapolis, IN 46241 (US)	(72) Inventor: LEE, Kang N. Zionsville Indiana 46077 (US) (74) Representative: Harrison Goddard Foote LLP  Belgrave Hall Belgrave Street Leeds LS2 8DD Leeds LS2 8DD (GB)