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 0896685 A1 19990217 - ORGANIC PHOTOCHROMIC CONTACT LENS COMPOSITIONS

Title (en)

ORGANIC PHOTOCHROMIC CONTACT LENS COMPOSITIONS

Title (de)

ORGANISCHE PHOTOCHROME MISCHUNGEN FÜR KONTAKTLINSEN

Title (fr)

COMPOSITIONS POUR LENTILLES DE CONTACT PHOTOCHROMIQUES ORGANIQUES

Publication

EP 0896685 A1 19990217 (EN)

Application

EP 97918785 A 19970421

Priority

US 9706776 W 19970421
US 1651796 P 19960430

Abstract (en)

[origin: WO9741468A1] The invention discloses organic photochromic contact lenses. In particular, it discloses a photochromic contact lens comprising organic photochromic materials consisting of a transparent polymer having a refractive index equal to at least 1.54 and at least one photochromic dye selected from the group consisting of spirooxazines, spiropyrans, chromenes, and a mixture of these.

IPC 1-7

G02B 5/23

IPC 8 full level

G02B 5/23 (2006.01)

CPC (source: EP)

G02B 5/23 (2013.01)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

WO 9741468 A1 19971106; EP 0896685 A1 19990217; EP 0896685 A4 20000719

DOCDB simple family (application)

US 9706776 W 19970421; EP 97918785 A 19970421