Global Patent Index - EP 1044051 A1

EP 1044051 A1 2000-10-18 - NOVEL METHODS AND APPARATUS FOR IMPROVED FILTRATION OF SUBMICRON PARTICLES

Title (en)

NOVEL METHODS AND APPARATUS FOR IMPROVED FILTRATION OF SUBMICRON PARTICLES

Title (de)

METHODE UND APPARAT ZUR FILTRATION VON KLEINSTPARTIKELN

Title (fr)

NOUVEAUX PROCEDES ET APPAREIL DE FILTRATION AMELIOREE DE PARTICULES SUBMICRONIQUES

Publication

EP 1044051 A1 (EN)

Application

EP 99946750 A

Priority

  • US 9920352 W
  • US 9892498 P

Abstract (en)

[origin: WO0013764A1] The subject invention pertains to novel methods of filtration, novel methods for production of filters, and novel filters, for the efficient filtration of particles. The materials and methods of the subject invention are particularly advantageous for the filtration of submicron particles, for example, nanoparticles, and can utilize the electrostatic attraction between particles and the fibers of microporous filters, for example, polypropylenefilters. The subject methods of filtration can lower the energy barrier between the particles and the filter surface and thus increase the deposition of particles on the surface of the filter. The methods and apparatus of the subject invention can be used to filter particles from many fluids including water and air. Advantageously, the subject surface modified filters can result in increased fluid flow, for the same pressure drop, compared to conventional filters.

IPC 1-7 (main, further and additional classification)

B01D 37/02

IPC 8 full level (invention and additional information)

B01D 39/00 (2006.01); B01D 39/20 (2006.01); B01D 46/44 (2006.01)

CPC (invention and additional information)

B01D 46/0028 (2013.01); B01D 39/00 (2013.01); B01D 39/18 (2013.01); B01D 39/2017 (2013.01); B01D 46/0035 (2013.01); B01D 2239/0414 (2013.01); B01D 2239/0428 (2013.01); B01D 2239/0471 (2013.01); B01D 2239/0613 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/10 (2013.01)

Citation (search report)

See references of WO 0013764A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0013764 A1 20000316; BR 9906684 A 20001017; EP 1044051 A1 20001018

INPADOC legal status


2003-01-02 [18W] WITHDRAWN

- Date of withdrawal: 20021104

2000-11-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000904

2000-10-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE