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: 160 790 656 patent documents

This week's update (03/01/2025 12:00 CET):

91 778 new documents added

251 574 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 0148140 A3 19870506 - IMPELLER FOR AERATION OF WATER TANKS

Title (en)

IMPELLER FOR AERATION OF WATER TANKS

Publication

EP 0148140 A3 19870506 (EN)

Application

EP 84850375 A 19841204

Priority

SE 8307006 A 19831219

Abstract (en)

[origin: EP0148140A2] The invention concerns an impeller for mixing purposes. The impeller has a leading edge angle which decreases from the hub and towards the tip, the tip vortexes then diminish and a more congruent division of the vortexes over the entire impeller blade is obtained.

IPC 1-7

B01F 15/00; C02F 3/12; B01F 3/04; B01F 7/22

IPC 8 full level

B01F 7/00 (2006.01); B01F 15/00 (2006.01)

CPC (source: EP)

B01F 27/112 (2022.01)

Citation (search report)

No search, Declaration under Rule 45 EPC

Designated contracting state (EPC)

AT BE DE FR GB IT NL SE

DOCDB simple family (publication)

EP 0148140 A2 19850710; EP 0148140 A3 19870506; SE 8307006 D0 19831219

DOCDB simple family (application)

EP 84850375 A 19841204; SE 8307006 A 19831219