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: 157 337 350 patent documents

This week's update (19/07/2024 12:00 CET):

219 431 new documents added

1 247 852 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 0099425 B1 19860910 - METHOD FOR PRODUCING A MESOPHASE PITCH DERIVED CARBON YARN AND FIBER

Title (en)

METHOD FOR PRODUCING A MESOPHASE PITCH DERIVED CARBON YARN AND FIBER

Publication

EP 0099425 B1 19860910 (EN)

Application

EP 82200943 A 19820722

Priority

EP 82200943 A 19820722

Abstract (en)

[origin: EP0099425A1] A method for producing a mesophase pitch derived carbon yarn (6) features collecting thermoset mesophase pitch yarn (8) onto a bobbin, and subjecting the thermoset yarn to a heat treatment in an inert atmosphere (9) to pyrolyze and carbonize the thermoset yarn.

IPC 1-7

D01F 9/14

IPC 8 full level

D01F 9/145 (2006.01)

CPC (source: EP)

D01F 9/145 (2013.01); B65H 2701/314 (2013.01)

Citation (examination)

US 4275051 A 19810623 - BARR JOHN B
US 4276278 A 19810630 - BARR JOHN B, et al

Designated contracting state (EPC)

DE GB IT NL

DOCDB simple family (publication)

EP 0099425 A1 19840201; EP 0099425 B1 19860910; DE 3273187 D1 19861016

DOCDB simple family (application)

EP 82200943 A 19820722; DE 3273187 T 19820722