(19)

(11)

EP 1 789 162 A2

(12)

(88) Date of publication A3: 30.11.2006 (43) Date of publication: 30.05.2007 Bulletin 2007/22 (21) Application number: 05740138.2 (22) Date of filing: 31.03.2005

(51) International Patent Classification (IPC):  B01D 63/00(2006.01) (86) International application number: PCT/US2005/010976 (87) International publication number: WO 2005/100264 (27.10.2005 Gazette 2005/43)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR LV MK YU (30) Priority: 06.04.2004 US 895432 18.05.2004 US 572387 P (71) Applicant: Vost Environmental Technologies Kirkland WA 98033-7356 (US)	(72) Inventor: POLLOCK, David, C. Calgary, AB T2J 5A2 (CA) (74) Representative: Jorio, Paolo et al Studio Torta S.r.l. Via Viotti, 9 10121 Torino 10121 Torino (IT)