(19)

(11)

EP 2 627 793 A2

(12)

(88) Date of publication A3: 05.07.2012 (43) Date of publication: 21.08.2013 Bulletin 2013/34 (21) Application number: 11833426.7 (22) Date of filing: 13.10.2011

(51) International Patent Classification (IPC):  C22F 1/00(2006.01) C21D 11/00(2006.01) C03B 5/00(2006.01) C21D 1/34(2006.01) C22C 45/00(2006.01) (86) International application number: PCT/US2011/056194 (87) International publication number: WO 2012/051443 (19.04.2012 Gazette 2012/16)

(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: 13.10.2010 US 392560 P (71) Applicant: California Institute of Technology Pasadena, CA 91125 (US)	(72) Inventors: KALTENBOECK, Georg Pasadena CA 91104 (US) SCHRAMM, Joseph, P. Albany CA 94706 (US) DEMETRIOU, Marios, D. Los Angeles CA 90048 (US) JOHNSON, William, L. San Marino CA 91108 (US) (74) Representative: Elsy, David  Withers & Rogers LLP 4 More London Riverside London SE1 2AU London SE1 2AU (GB)