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: 157 484 516 patent documents

This week's update (26/07/2024 12:00 CET):

147 225 new documents added

921 612 documents amended

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EP 0835169 A1 19980415 - ON-SITE MANUFACTURE OF ULTRA-HIGH-PURITY HYDROCHLORIC ACID FOR SEMICONDUCTOR PROCESSING

Title (en)

ON-SITE MANUFACTURE OF ULTRA-HIGH-PURITY HYDROCHLORIC ACID FOR SEMICONDUCTOR PROCESSING

Title (de)

HERSTELLUNGAN ORT VON ULTRAHOCHREINER SALZSAURE FUER HALBLEITERBEHANDLUNG

Title (fr)

FABRICATION SUR SITE D'ACIDE CHLORHYDRIQUE ULTRAPUR POUR LE TRAITEMENT DES SEMI-CONDUCTEURS

Publication

EP 0835169 A1 19980415 (EN)

Application

EP 96919224 A 19960605

Priority

US 9609555 W 19960605
US 9507649 W 19950605
US 49941395 A 19950707
US 3871295 P 19950707

IPC 1-7

B08B 7/04; B01D 1/00; B01D 3/14; B01D 3/02; B01D 3/00; C01B 7/19; C01B 7/07; F26B 7/00

IPC 8 full level

B01D 1/00 (2006.01); B01D 3/00 (2006.01); B01D 3/02 (2006.01); B01D 3/14 (2006.01); B08B 7/04 (2006.01); C01B 7/07 (2006.01); C01B 7/19 (2006.01); F26B 7/00 (2006.01)

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0835169 A1 19980415; EP 0835169 A4 19991215

DOCDB simple family (application)

EP 96919224 A 19960605