(19)

(11)

EP 2 297 525 A1

(12)

(43) Date of publication: 23.03.2011 Bulletin 2011/12 (21) Application number: 09743395.7 (22) Date of filing: 04.05.2009

(51) International Patent Classification (IPC):  F24F 7/02(2006.01) (86) International application number: PCT/US2009/042719 (87) International publication number: WO 2009/137409 (12.11.2009 Gazette 2009/46)

(84) Designated Contracting States: 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 SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 04.05.2008 US 114774 (71) Applicants: Skidmore, Owings & Merrill LLP New York, NY 10005 (US) Holt, Nicholas New York, NY 10016 (US)	(72) Inventors: HOLT, Nicholas New York, NY 10016 (US) COOPER, Christopher, P. Brooklyn, NY 11231 (US) FRECHETTE, Roger, Eugene, III Lake Forest IL 60045 (US) BAKER, William, F. Evanston IL 60202 (US) (74) Representative: Pierrou, Mattias  Awapatent AB P.O. Box 45 086 104 30 Stockholm 104 30 Stockholm (SE)