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 1756055 A1 20070228 - PROCESS FOR THE PURIFICATION OF TRYPTOPHAN

Title (en)

PROCESS FOR THE PURIFICATION OF TRYPTOPHAN

Title (de)

VERFAHREN ZUR AUFREINIGUNG VON TRYPTOPHAN

Title (fr)

PROCEDE DE PURIFICATION DE TRYPTOPHANE

Publication

EP 1756055 A1 20070228 (EN)

Application

EP 05740139 A 20050318

Priority

EP 2005051271 W 20050318
IT FI20040063 A 20040319

Abstract (en)

[origin: WO2005090306A1] A process is described enabling tryptophan, obtained from biological fermentation processes, to be purified by simple means and with very good yields.

IPC 8 full level

C07D 209/20 (2006.01)

CPC (source: EP)

C07D 209/20 (2013.01)

Citation (search report)

See references of WO 2005090306A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2005090306 A1 20050929; EP 1756055 A1 20070228; IT FI20040063 A1 20040619

DOCDB simple family (application)

EP 2005051271 W 20050318; EP 05740139 A 20050318; IT FI20040063 A 20040319