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The patent EP3861151 was granted to Nouryon Chemicals on Jun 21, 2023. The application was filed on Oct 1, 2019 under application number EP19779899A. 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 |
|---|---|---|---|
| ARKEMA FRANCE | Mar 21, 2024 | BANDPAY & GREUTER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0298055 |
| DESCRIPTION | EP2430214 |
| DESCRIPTION | US5622613 |
| DESCRIPTION | WO2009063031 |
| DESCRIPTION | WO2010130546 |
| DESCRIPTION | WO2017050867 |
| DESCRIPTION | WO2017050873 |
| INTERNATIONAL-SEARCH-REPORT | EP0298055 |
| INTERNATIONAL-SEARCH-REPORT | EP3023517 |
| INTERNATIONAL-SEARCH-REPORT | JPH07252683 |
| INTERNATIONAL-SEARCH-REPORT | US2012305407 |
| INTERNATIONAL-SEARCH-REPORT | US2018265996 |
| OPPOSITION | JPH07252683 |
| OPPOSITION | US2008230381 |
| OPPOSITION | US2012305389 |
| OPPOSITION | US2018265996 |
| OPPOSITION | US429595 |
| OPPOSITION | WO2010130546 |
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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Decision to grant a European patent
Search/Exam
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(Electronic) Receipt
Search/Exam
May 11, 2023
French translation of claims
Search/Exam
May 11, 2023
German translation of the claims
Search/Exam
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Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
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Text intended for grant (clean copy)
Search/Exam
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Examination started
Search/Exam
Nov 16, 2021
(Electronic) Receipt
Search/Exam
Nov 16, 2021
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Amended claims with annotations
Search/Exam
Nov 16, 2021
Amendments received before examination
Search/Exam
Nov 16, 2021
Letter accompanying subsequently filed items
Search/Exam
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Priority search results copy provided by EPO
Search/Exam
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Notification of the recording of a change
Search/Exam
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Notification of the recording of a change
Search/Exam
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Notification of the recording of a change
Search/Exam
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(Electronic) Receipt
Search/Exam
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Request for entry into the European phase
Search/Exam
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Information on entry into European phase
Search/Exam
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Copy of the international search report
Search/Exam
Apr 9, 2020
Published international application - A1
Search/Exam
Dec 11, 2019
ISR: cited documents
PCTISA
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(Electronic) Receipt
PCTRO
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Abstract
PCTRO
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Claims
PCTRO
Oct 1, 2019
Description
PCTRO
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PCTRO
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