(19)

(11)

EP 1 497 015 A2

(12)

(88) Date of publication A3: 25.03.2004 (43) Date of publication: 19.01.2005 Bulletin 2005/03 (21) Application number: 03721771.8 (22) Date of filing: 17.04.2003

(51) International Patent Classification (IPC)7: B01D 63/00, B01D 29/00, C02F 1/44 (86) International application number: PCT/US2003/012068 (87) International publication number: WO 2003/088864 (30.10.2003 Gazette 2003/44)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 19.04.2002 US 373983 P 08.11.2002 US 425199 P (71) Applicant: Amersham Biosciences Membrane Separations Corp. Westborough, MA 01581 (US)	(72) Inventor: HERCZEG, Attila Southborough, MA 01772 (US) (74) Representative: Franks, Barry Gerard et al Amersham plc,Amersham Place Little Chalfont, Bucks. HP7 9NA Little Chalfont, Bucks. HP7 9NA (GB)