(19)

(11)

EP 1 056 685 A1

(12)

(43) Date of publication: 06.12.2000 Bulletin 2000/49 (21) Application number: 99906974.3 (22) Date of filing: 12.02.1999

(51) International Patent Classification (IPC)7: C02F 1/461, C02F 1/467 (86) International application number: PCT/US9903/064 (87) International publication number: WO 9941/204 (19.08.1999 Gazette 1999/33)

(84) Designated Contracting States: AT BE CH DE ES FR GB GR IT LI NL PT SE (30) Priority: 17.02.1998 US 25120 (71) Applicant: Potable Water Systems Ldt. Houston, TX 77024 (US)	(72) Inventor: MILLER, Jorge Houston, TX 77056 (US) (74) Representative: Ruschke, Hans Edvard, Dipl.-Ing. et al Ruschke Hartmann BeckerPienzenauerstrasse 2 81679 München 81679 München (DE)