(19)

(11)

EP 2 638 322 A2

(12)

(43) Date of publication: 18.09.2013 Bulletin 2013/38 (21) Application number: 11782336.9 (22) Date of filing: 31.10.2011

(51) International Patent Classification (IPC):  F23L 7/00(2006.01) (86) International application number: PCT/US2011/058602 (87) International publication number: WO 2012/064545 (18.05.2012 Gazette 2012/20)

(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 Designated Extension States: BA ME (30) Priority: 10.11.2010 US 412119 P (71) Applicant: Praxair Technology, Inc. Danbury, CT 06810 (US)	(72) Inventors: KOBAYASHI, Hisashi Bedford NY (US) BOOL III, Lawrence, E. East Aurora NY 14052 (US) (74) Representative: Schwan - Schwan - Schorer  Patentanwälte Bauerstrasse 22 80796 München 80796 München (DE)