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: 157 636 699 patent documents

This week's update (09/08/2024 12:00 CET):

43 606 new documents added

1 129 815 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 0019889 A1 19801210 - Zinc oxide varistor.

Title (en)

Zinc oxide varistor.

Title (de)

Zinkoxid-Varistor.

Title (fr)

Varistance en oxyde de zinc.

Publication

EP 0019889 A1 19801210 (DE)

Application

EP 80102903 A 19800523

Priority

DE 2922035 A 19790530

Abstract (en)

ZnO-varistor, particularly a medium-voltage varistor having the following constitution of its original components: 93 to 98 At% Zn, 0.6 to 1.0 At% Bi, 0.9 to 1.3 At% Co, remainder Mn, Sb, Cr, Ni, Ti, Sn. <IMAGE>

Abstract (de)

ZnO-Varistor, insbesondere Mittelspannungsvaristor mit folgender Zusammensetzung seiner Ausgangskomponenten: 93 bis 98 At% Zn, 0,6 bis 1,0 At% Bi, 0,9 bis 1,3 At% Co Rest Mn, Sb, Cr, Ni, Ti, Sn.

IPC 1-7

H01C 7/10; H01C 17/00

IPC 8 full level

H01C 7/112 (2006.01)

CPC (source: EP)

H01C 7/112 (2013.01)

Citation (search report)

DE 2642567 A1 19770407 - GEN ELECTRIC
NL 7512533 A 19760506 - GEN ELECTRIC
DE 2740566 A1 19790322 - SIEMENS AG
DE 2657805 A1 19770707 - GEN ELECTRIC
FR 2246038 A1 19750425 - GEN ELECTRIC [US]

Designated contracting state (EPC)

FR GB IT

DOCDB simple family (publication)

EP 0019889 A1 19801210

DOCDB simple family (application)

EP 80102903 A 19800523