(19)

(11)

EP 1 289 621 A1

(12)

(43) Date of publication: 12.03.2003 Bulletin 2003/11 (21) Application number: 00932289.2 (22) Date of filing: 11.05.2000

(51) International Patent Classification (IPC)7: B01D 21/26, B01D 61/00 (86) International application number: PCT/US0012/876 (87) International publication number: WO 0108/5299 (15.11.2001 Gazette 2001/46)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (71) Applicant: Schleicher & Schuell, Inc. KeeneNew Hampshire 03431 (US)	(72) Inventor: ZUK, Peter, Jr. Harvard, MA 01451 (US) (74) Representative: Lawrence, John  Barker Brettell 138 Hagley RoadEdgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)