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The patent EP3710634 was granted to SUN Chemical on May 3, 2023. The application was filed on Nov 9, 2018 under application number EP18877281A. 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 |
|---|---|---|---|
| KEMIRA OYJ | Feb 2, 2024 | ESPATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2016145806 |
| DESCRIPTION | US2018245291 |
| DESCRIPTION | US6348536 |
| DESCRIPTION | WO2008141771 |
| DESCRIPTION | WO2011110498 |
| DESCRIPTION | WO2017074991 |
| INTERNATIONAL-SEARCH-REPORT | US5385967 |
| INTERNATIONAL-SEARCH-REPORT | US6441080 |
| INTERNATIONAL-SEARCH-REPORT | US6447899 |
| OPPOSITION | EP2358942 |
| OPPOSITION | GB1234880 |
| OPPOSITION | GB2433450 |
| OPPOSITION | US2006222845 |
| OPPOSITION | US2007232743 |
| OPPOSITION | US6441080 |
| OPPOSITION | US6447899 |
| OPPOSITION | US6545079 |
| OPPOSITION | WO2017074991 |
| OPPOSITION | WO9426513 |
| SEARCH | EP0499578 |
| SEARCH | WO2017074991 |
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.
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(Electronic) Receipt
Appeal
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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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Decision to grant a European patent
Search/Exam
Mar 21, 2023
(Electronic) Receipt
Search/Exam
Mar 21, 2023
Filing of the translations of the claims
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Mar 21, 2023
French translation of claims
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Mar 21, 2023
German translation of the claims
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Mar 21, 2023
Letter accompanying subsequently filed items
Search/Exam
Nov 11, 2022
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Intention to grant (signatures)
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Nov 11, 2022
Text intended for grant (clean copy)
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Nov 11, 2022
Apr 1, 2022
(Electronic) Receipt
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Amended description with annotations
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Description
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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Examination started
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(Electronic) Receipt
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Amended claims with annotations
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Jan 28, 2022
Amendments received before examination
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Letter accompanying subsequently filed items
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Aug 13, 2021
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Letter accompanying subsequently filed items
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European search opinion
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Information on Search Strategy
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Supplementary European search report
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Jun 30, 2021
Search started
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Aug 26, 2020
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Letter which had not been notified
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Jul 7, 2020
(Electronic) Receipt
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Jul 7, 2020
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Amended claims with annotations
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Jul 7, 2020
Amendments received before examination
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Jul 7, 2020
Letter accompanying subsequently filed items
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Jun 23, 2020
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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May 20, 2020
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(Electronic) Receipt
Search/Exam
May 11, 2020
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Amendments received before examination
Search/Exam
May 11, 2020
Request for entry into the European phase
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Mar 20, 2020
Information on entry into European phase
Search/Exam
Mar 17, 2020
Notification of the recording of a change
Search/Exam
Sep 23, 2019
Notification of election of EPO
Search/Exam
Jun 12, 2019
May 16, 2019
Copy of the international search report
Search/Exam
May 16, 2019
Published international application - A1
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