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(11)

EP 2 864 714 A1

(12)

(43) Date of publication: 29.04.2015 Bulletin 2015/18 (21) Application number: 13776058.3 (22) Date of filing: 09.04.2013

(51) International Patent Classification (IPC):  F24H 9/00(2006.01) F24D 19/00(2006.01) F24H 9/20(2006.01) F24D 19/10(2006.01) (86) International application number: PCT/US2013/035713 (87) International publication number: WO 2013/155036 (17.10.2013 Gazette 2013/42)

(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: 09.04.2012 US 201213442324 (71) Applicant: Nalco Company Naperville, IL 60563 (US)	(72) Inventors: HICKS, Peter, D. Aurora, II 60504 (US) GRATTAN, David, A. Bolingbrook, II 60440 (US) (74) Representative: Godemeyer Blum Lenze Patentanwälte Partnerschaft mbB  werkpatent An den Gärten 7 51491 Overath 51491 Overath (DE)