Global patent index - EP 0968408 A2

EP 0968408 A2 2000-01-05 - METHOD OF MEASURING PARTICLE SIZES

Title (en)

METHOD OF MEASURING PARTICLE SIZES

Title (de)

VERFAHREN ZUR PARTIKELGRÖSSENMESSUNG

Title (fr)

PROCEDE DE MESURE GRANULOMETRIQUE

Publication

EP 0968408 A2 (DE)

Application

EP 98916951 A

Priority

  • DE 19711494 A
  • EP 9801490 W

Abstract (en)

[origin: WO9841840A2] The invention concerns a method of measuring particle sizes by measuring the attenuation of radiation after passing through a defined measuring section containing a dispersed system. According to the invention, the temporally fluctuating transmission signal is picked up with variable temporal or spatial resolution. These picked-up transmission signals are then subjected to a non-linear operation. The result of the non-linear operation is represented as a spectral variation, that is as a function of the spatial or temporal resolution, and evaluated.

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

G01N 15/02

IPC 8 full level (invention and additional information)

G01N 15/02 (2006.01)

CPC (invention and additional information)

G01N 15/02 (2013.01); G01N 2015/0222 (2013.01)

Citation (search report)

See references of WO 9841840A3

Designated contracting state (EPC)

DE DK FR GB NL

EPO simple patent family

WO 9841840 A2 19980924; WO 9841840 A3 19981203; AU 7035598 A 19981012; DE 19711494 C1 19981015; EP 0968408 A2 20000105; JP 2001516451 A 20010925; US 6587200 B1 20030701

INPADOC legal status

2004-07-14 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20040108

2002-08-14 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020701

2000-01-05 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990929

2000-01-05 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE DK FR GB NL