(19)

(11)

EP 2 652 165 A1

(12)

(43) Date of publication: 23.10.2013 Bulletin 2013/43 (21) Application number: 11849450.9 (22) Date of filing: 15.12.2011

(51) International Patent Classification (IPC):  C22C 45/00(2006.01) H01F 1/04(2006.01) C03C 3/062(2006.01) (86) International application number: PCT/US2011/065208 (87) International publication number: WO 2012/083044 (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: 29.11.2011 US 201113306311 15.12.2010 US 423304 P (71) Applicant: California Institute of Technology Pasadena, CA 91125 (US)	(72) Inventors: 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)