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(11)

EP 1 765 481 A2

(12)

(43) Date of publication: 28.03.2007 Bulletin 2007/13 (21) Application number: 05724413.9 (22) Date of filing: 04.03.2005

(51) International Patent Classification (IPC):  B01D 29/00(2006.01) B01D 50/00(2006.01) B01D 27/06(2006.01) (86) International application number: PCT/US2005/006866 (87) International publication number: WO 2005/089114 (29.09.2005 Gazette 2005/39)

(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: 04.03.2004 US 550126 P 03.03.2005 US 72043 (71) Applicants: Freeman, Jon Joseph Channelview, TX 77530 (US) FREEMAN, Mark C. Channelview, TX 77530 (US) Freeman, Clarence S. Channelview, TX 77530 (US)	(72) Inventors: Freeman, Jon Joseph Channelview, TX 77530 (US) FREEMAN, Mark C. Channelview, TX 77530 (US) Freeman, Clarence S. Channelview, TX 77530 (US) (74) Representative: Holmes, Matthew Peter et al MARKS & CLERK, Sussex House, 83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)