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: 157 117 910 patent documents

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

139 301 new documents added

1 340 825 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 0407501 A4 19910724 - METHOD AND COMPOSITION FOR DEINKING RECYCLED PAPER PULP

Title (en)

METHOD AND COMPOSITION FOR DEINKING RECYCLED PAPER PULP

Publication

EP 0407501 A4 19910724 (EN)

Application

EP 89912369 A 19891020

Priority

US 26294788 A 19881026

Abstract (en)

[origin: WO9004674A1] Amphoteric surfactants are useful in flotation deinking of recycled waste paper especially that which has been subject to laser printing.

IPC 1-7

D21C 5/02

IPC 8 full level

D21C 5/02 (2006.01)

CPC (source: EP)

D21C 5/027 (2013.01); Y02W 30/64 (2015.05)

Citation (search report)

[A] US 4013505 A 19770322 - BALCAR CESTMIR, et al
See references of WO 9004674A1

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

WO 9004674 A1 19900503; EP 0407501 A1 19910116; EP 0407501 A4 19910724; JP H03504523 A 19911003

DOCDB simple family (application)

US 8904694 W 19891020; EP 89912369 A 19891020; JP 51145689 A 19891020