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: 159 515 718 patent documents

This week's update (01/11/2024 12:00 CET):

154 531 new documents added

1 078 520 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 0731827 A1 19960918 - DRILLING FLUID

Title (en)

DRILLING FLUID

Title (de)

BOHRFLÜSSIGKEIT

Title (fr)

FLUIDE DE FORAGE

Publication

EP 0731827 A1 19960918 (EN)

Application

EP 95904419 A 19941202

Priority

EP 9404033 W 19941202
GB 9324834 A 19931203

Abstract (en)

[origin: WO9515364A1] The use in a drilling fluid of an ester obtainable by the reaction of a monobasic carboxylic acid having at most 11 carbon atoms and a monohydric alcohol, wherein the acid is produced by the oxo process.

IPC 1-7

C09K 7/06; C09K 7/02

IPC 8 full level

C09K 8/28 (2006.01); C09K 8/34 (2006.01); C09K 8/36 (2006.01)

CPC (source: EP)

C09K 8/28 (2013.01); C09K 8/34 (2013.01); C09K 8/36 (2013.01)

Citation (search report)

See references of WO 9515364A1

Designated contracting state (EPC)

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

DOCDB simple family (publication)

WO 9515364 A1 19950608; AU 1311995 A 19950619; EP 0731827 A1 19960918; GB 9324834 D0 19940119; NO 962258 D0 19960531; NO 962258 L 19960709

DOCDB simple family (application)

EP 9404033 W 19941202; AU 1311995 A 19941202; EP 95904419 A 19941202; GB 9324834 A 19931203; NO 962258 A 19960531