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: 156 632 791 patent documents

This week's update (21/06/2024 12:00 CET):

121 162 new documents added

981 197 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 1255798 A2 20021113 - POLAR DIPHENYLDIACETYLENE LIQUID CRYSTALS

Title (en)

POLAR DIPHENYLDIACETYLENE LIQUID CRYSTALS

Title (de)

POLARE DIPHENYLDIACETYLENFLÜSSIGKRISTALLE

Title (fr)

CRISTAUX LIQUIDES DE DIPHENYLDIACETYLENES POLAIRES

Publication

EP 1255798 A2 20021113 (EN)

Application

EP 00992216 A 20001218

Priority

US 0034403 W 20001218
US 18272700 P 20000215
US 54173500 A 20000403

IPC 1-7

C09K 19/18; C07C 22/08; C07C 25/18; C07C 25/24; C07C 255/50; C07C 43/225

IPC 8 full level

C07B 61/00 (2006.01); C07C 17/266 (2006.01); C07C 22/08 (2006.01); C07C 25/18 (2006.01); C07C 25/24 (2006.01); C07C 43/225 (2006.01); C07C 255/50 (2006.01); C09K 19/18 (2006.01)

Citation (search report)

See references of WO 0160946A2

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

EP 1255798 A2 20021113; JP 2004518608 A 20040624

DOCDB simple family (application)

EP 00992216 A 20001218; JP 2001560318 A 20001218