GPI coverage and content

You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 159 679 824 patent documents

This week's update (08/11/2024 12:00 CET):

164 112 new documents added

576 445 documents amended

GPI key values

Run regular monitoring (e.g. monthly or quarterly) of technical areas or companies

Use built-in charts to visualise technical trends and patenting activity of companies

Choose the data you want to see and download to focus on what you are interested in

Run data quality assessments to measure the risk of incomplete search results

EP 0144521 B1 19880309 - ELECTROSTATIC PRECIPITATOR APPARATUS HAVING AN IMPROVED ION GENERATING MEANS

Title (en)

ELECTROSTATIC PRECIPITATOR APPARATUS HAVING AN IMPROVED ION GENERATING MEANS

Publication

EP 0144521 B1 19880309 (EN)

Application

EP 84109494 A 19801020

Priority

EP 84109494 A 19801020

Abstract (en)

[origin: EP0144521A2] A precipitating stage having one or more electrically charged shells (30) with flat sides generally parallel to collecting side plates for providing a uniform electric field in the medium carrying space, the sides of the shell having openings (56) through which ions generated in the interior pass into the gaseous medium. A corono discharge apparatus (68) inside the shell produces the ions at predictable, generally uniformly spaced locations.

IPC 1-7

B03C 3/38

IPC 8 full level

B03C 3/38 (2006.01)

CPC (source: EP)

B03C 3/38 (2013.01)

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0144521 A2 19850619; EP 0144521 A3 19850710; EP 0144521 B1 19880309; AT E32838 T1 19880315

DOCDB simple family (application)

EP 84109494 A 19801020; AT 84109494 T 19801020