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: 157 484 516 patent documents

This week's update (26/07/2024 12:00 CET):

147 225 new documents added

921 612 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 2290663 B1 20170125 - Oil transformer

Title (en)

Oil transformer

Title (de)

Öltransformator

Title (fr)

Transformateur à huile

Publication

EP 2290663 B1 20170125 (DE)

Application

EP 09011109 A 20090829

Priority

EP 09011109 A 20090829

Abstract (en)

[origin: EP2290663A1] The oil transformer (50) is provided with a transformer tank (12), where an oil expansion tank (14) is connected to the transformer tank by flow channels (16a,16b,16c). The hollow chambers (18a,18b) are provided along the flow channel or on the oil expansion tank. The closing openings (20a,20b) are provided for discharging gas. An independent claim is also included for a method for recycling of an oil sample into an oil transformer.

IPC 8 full level

H01F 27/14 (2006.01)

CPC (source: EP)

H01F 27/14 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DOCDB simple family (publication)

EP 2290663 A1 20110302; EP 2290663 B1 20170125; WO 2011023295 A1 20110303

DOCDB simple family (application)

EP 09011109 A 20090829; EP 2010004905 W 20100811