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: 159 212 084 patent documents

This week's update (18/10/2024 12:00 CET):

125 820 new documents added

1 120 546 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 0286462 B1 19910918 - MINIATURE JOULE-THOMSON EXPANSION REFRIGERATOR, AND METHOD OF MANUFACTURING IT

Title (en)

MINIATURE JOULE-THOMSON EXPANSION REFRIGERATOR, AND METHOD OF MANUFACTURING IT

Publication

EP 0286462 B1 19910918 (FR)

Application

EP 88400485 A 19880302

Priority

FR 8703027 A 19870306

Abstract (en)

[origin: EP0286462A1] This refrigerator (2) comprises an internal helical tube (11) soldered to a mandrel (8) and an external helical tube (12) soldered in a cylindrical envelope (9) which surrounds the mandrel, the turns of the two tubes penetrating each other. Application in cooling of infra-red detectors. <IMAGE>

IPC 1-7

B21D 53/06; F25B 9/02; F28D 7/02; F28D 7/04

IPC 8 full level

B21D 53/06 (2006.01); F25B 9/02 (2006.01); F28D 7/02 (2006.01); F28D 7/04 (2006.01)

CPC (source: EP)

B21D 53/06 (2013.01); F25B 9/02 (2013.01); F28D 7/024 (2013.01); F28D 7/04 (2013.01)

Designated contracting state (EPC)

BE CH DE ES FR GB IT LI

DOCDB simple family (publication)

FR 2611870 A1 19880909; FR 2611870 B1 19890609; DE 3864878 D1 19911024; EP 0286462 A1 19881012; EP 0286462 B1 19910918

DOCDB simple family (application)

FR 8703027 A 19870306; DE 3864878 T 19880302; EP 88400485 A 19880302