(19)

(11)

EP 2 807 432 A1

(12)

(43) Date of publication: 03.12.2014 Bulletin 2014/49 (21) Application number: 11871382.5 (22) Date of filing: 17.11.2011

(51) International Patent Classification (IPC):  F25B 21/02(2006.01) (86) International application number: PCT/US2011/001914 (87) International publication number: WO 2013/074057 (23.05.2013 Gazette 2013/21)

(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 (71) Applicant: Sheetak, Inc. Austin, TX 78744 (US)	(72) Inventors: GHOSHAL, Uttam Austin, TX 78733 (US) GUHA, Ayan Austin, TX 78749 (US) POKHARNA, Himanshu Saratoga, CA 95070 (US) (74) Representative: Hagmann-Smith, Martin P.  Marks & Clerk LLP Fletcher House Heatley Road The Oxford Science Park Oxford OX4 4GE Oxford OX4 4GE (GB)