(19)

(11)

EP 0 618 834 A1

(12)

(43) Date of publication: 12.10.1994 Bulletin 1994/41 (21) Application number: 93901896.0 (22) Date of filing: 22.12.1992

(51) International Patent Classification (IPC):  B01D 29/ 39( . ) B01D 29/ 62( . ) B01D 65/ 00( . ) B01D 29/ 05( . ) B01D 63/ 16( . ) B01D 65/ 08( . ) (86) International application number: PCT/US1992/011148 (87) International publication number: WO 1993/012859 (08.07.1993 Gazette 1993/16)

(84) Designated Contracting States: AT BE CH DE DK ES FR IE IT LI NL SE (30) Priority: 24.12.1991 US 19910812123 (71) Applicant: Pall Corporation East Hills, New York 11548 (US)

(72) Inventors: MILLER, John, D. Ithaca, NY 14850 (US) FENDYA, Thomas, J. Homer, NY 13077 (US) RYAN, John, E., Jr. Cortland, NY 13045 (US) RANDHAHN, Horst D-6100 Darmstadt (DE) VOGELMANN, Hartmut D-6072 Dreieich (DE) (74) Representative: Knott, Stephen Gilbert, et al  MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge Middlesex UB10 8BZ Ickenham Uxbridge Middlesex UB10 8BZ (GB)