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The patent EP3399354 was granted to Jiangsu Conant Optics on May 6, 2020. The application was filed on Jan 26, 2016 under application number EP16865267A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| PPG INDUSTRIES | Feb 8, 2021 | F & E | - |
| PPG INDUSTRIES | Feb 8, 2021 | F & E PATENT | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | CN101216611 |
| INTERNATIONAL-SEARCH-REPORT | CN102617432 |
| INTERNATIONAL-SEARCH-REPORT | CN104327237 |
| INTERNATIONAL-SEARCH-REPORT | CN1879041 |
| OPPOSITION | EP1208124 |
| OPPOSITION | EP2618206 |
| OPPOSITION | EP3381951 |
| OPPOSITION | JPS60245607 |
| OPPOSITION | US2019153131 |
| OPPOSITION | US4607087 |
| OPPOSITION | US4959433 |
| OPPOSITION | US6812265 |
| OPPOSITION | WO0031584 |
| OPPOSITION | WO9720247 |
| SEARCH | CN104742389 |
| SEARCH | EP1208124 |
| SEARCH | EP2618206 |
| SEARCH | JPS60245607 |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Means of redress
OPPO
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(Electronic) Receipt
Appeal
May 24, 2024
General enquiry
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Aug 18, 2023
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Feb 1, 2023
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Notice of appeal
Appeal
Jan 31, 2023
(Electronic) Receipt
Appeal
Jan 31, 2023
Dec 8, 2022
Advice of delivery
Search/Exam
Dec 2, 2022
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Means of redress
OPPO
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Apr 9, 2020
Decision to grant a European patent
Search/Exam
Mar 24, 2020
(Electronic) Receipt
Search/Exam
Mar 24, 2020
French translation of claims
Search/Exam
Mar 24, 2020
German translation of the claims
Search/Exam
Mar 24, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 25, 2020
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Intention to grant (signatures)
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Feb 25, 2020
Text intended for grant (clean copy)
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Feb 25, 2020
Aug 20, 2019
(Electronic) Receipt
Search/Exam
Aug 20, 2019
Amended claims with annotations
Search/Exam
Aug 20, 2019
Amended description with annotations
Search/Exam
Aug 20, 2019
Claims
Search/Exam
Aug 20, 2019
Description
Search/Exam
Aug 20, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 20, 2019
Jul 1, 2019
Annex to the communication
Search/Exam
Jul 1, 2019
Communication from the Examining Division
Search/Exam
May 15, 2019
(Electronic) Receipt
Search/Exam
May 15, 2019
Priority search results
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May 15, 2019
Priority search results
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May 15, 2019
Priority search results
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May 15, 2019
Priority search results
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May 15, 2019
Priority search results
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May 15, 2019
Priority search results
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May 15, 2019
Apr 30, 2019
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(Electronic) Receipt
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Apr 15, 2019
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Amended claims with annotations
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Apr 15, 2019
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Amended description with annotations
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Apr 15, 2019
Amendments received before examination
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Apr 15, 2019
Letter accompanying subsequently filed items
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Mar 20, 2019
(Electronic) Receipt
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Mar 20, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 20, 2019
Letter concerning the priority
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Mar 20, 2019
Translation of priority document
Search/Exam
Nov 30, 2018
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Nov 13, 2018
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European search opinion
Search/Exam
Nov 13, 2018
Information on Search Strategy
Search/Exam
Nov 13, 2018
Supplementary European search report
Search/Exam
Oct 10, 2018
Notification of forthcoming publication
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Aug 3, 2018
Communication to designated inventor
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Aug 3, 2018
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Aug 3, 2018
Communication to designated inventor
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Jul 18, 2018
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Copy of the international search report
Search/Exam
Jul 6, 2017
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International publication pamphlet
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Jun 20, 2017
Annex
Search/Exam
Jun 20, 2017
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Copy of the international search report
Search/Exam
Jun 20, 2017
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Jun 12, 2017
Enquiry with the International Bureau
Search/Exam
Jun 12, 2017
Information regarding early processing
Search/Exam
May 23, 2017
Matter concerning the application
Search/Exam
May 22, 2017
(Electronic) Receipt
Search/Exam
May 22, 2017
Abstract
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May 22, 2017
Claims
Search/Exam
May 22, 2017
Description
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May 22, 2017
Request for entry into the European phase
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