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: 148 267 091 patent documents

This week's update (02/06/2023 12:00 CET):

152 342 new documents added

848 308 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 0979947 A2 20000216 - Turbomolecular pump

Title (en)

Turbomolecular pump

Title (de)

Turbomolekularpumpe

Title (fr)

Pompe turbomoléculair

Publication

EP 0979947 A2 20000216 (EN)

Application

EP 99306359 A 19990811

Priority

JP 22792298 A 19980812

Abstract (en)

A turbomolecular pump is provided in which the structure of a stator blade (20) is improved for cooling rotor blades (2), thereby achieving a higher thermal conduction efficiency. The arrangement provides contact surfaces of the stator blades (20) and stator blade spacers (22) to be engaged/crushed upon assembling the pump. <IMAGE> <IMAGE>

IPC 1-7

F04D 19/04; F04D 29/58

IPC 8 full level

F04D 19/04 (2006.01); F04D 29/00 (2006.01); F04D 29/58 (2006.01)

CPC (source: EP KR)

F04D 19/042 (2013.01 - EP); F04D 29/00 (2013.01 - KR); F04D 29/542 (2013.01 - EP); F04D 29/5853 (2013.01 - EP)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0979947 A2 20000216; EP 0979947 A3 20010328; JP 2000064986 A 20000303; KR 20000017282 A 20000325

DOCDB simple family (application)

EP 99306359 A 19990811; JP 22792298 A 19980812; KR 19990033123 A 19990812