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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: 156 978 933 patent documents

This week's update (05/07/2024 12:00 CET):

169 914 new documents added

2 331 667 documents amended

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EP 0490297 B1 19930929 - PHOTOGRAPHIC MATERIALS WITH ENHANCED LATENT IMAGE STABILITY

Title (en)

PHOTOGRAPHIC MATERIALS WITH ENHANCED LATENT IMAGE STABILITY

Publication

EP 0490297 B1 19930929 (EN)

Application

EP 91120993 A 19911206

Priority

US 62526390 A 19901210

Abstract (en)

[origin: EP0490297A1] Latent image stability is enhanced in photographic recording materials using N-alkynyl benzothiazolium or benzoselenazolium salts.

IPC 1-7

C07D 277/62; C07D 293/12; G03C 1/34

IPC 8 full level

G03C 1/34 (2006.01)

CPC (source: EP)

G03C 1/346 (2013.01)

Designated contracting state (EPC)

BE CH DE FR GB IT LI NL

DOCDB simple family (publication)

EP 0490297 A1 19920617; EP 0490297 B1 19930929; DE 69100442 D1 19931104; DE 69100442 T2 19940505; JP H04269742 A 19920925

DOCDB simple family (application)

EP 91120993 A 19911206; DE 69100442 T 19911206; JP 32468791 A 19911209