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The patent EP4004131 was granted to SUN Chemical on Jul 23, 2025. The application was originally filed on Dec 3, 2020 under application number EP20825196A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP2302007 |
| DESCRIPTION | GB2554817 |
| DESCRIPTION | JP2019018457 |
| DESCRIPTION | US10195874 |
| DESCRIPTION | US2011159251 |
| DESCRIPTION | US2012154495 |
| DESCRIPTION | US2019105906 |
| DESCRIPTION | US8985753 |
| DESCRIPTION | US9238745 |
| DESCRIPTION | WO2016007593 |
| DESCRIPTION | WO2016186838 |
| DESCRIPTION | WO2016199589 |
| DESCRIPTION | WO2017095786 |
| DESCRIPTION | WO2017191043 |
| DESCRIPTION | WO2018197852 |
| INTERNATIONAL-SEARCH-REPORT | EP1412438 |
| INTERNATIONAL-SEARCH-REPORT | EP2169021 |
| INTERNATIONAL-SEARCH-REPORT | WO2016179213 |
| INTERNATIONAL-SEARCH-REPORT | WO2016186838 |
| INTERNATIONAL-SEARCH-REPORT | WO2018022590 |
| INTERNATIONAL-SEARCH-REPORT | WO2019190585 |
| OPPOSITION | EP3300915 |
| OPPOSITION | EP3572234 |
| OPPOSITION | EP4004131 |
| OPPOSITION | US2012270018 |
| OPPOSITION | US2015203695 |
| OPPOSITION | US2016152042 |
| OPPOSITION | WO2015173552 |
| OPPOSITION | WO2018042193 |
| OPPOSITION | WO2019081339 |
| OPPOSITION | WO9731071 |
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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Jun 26, 2025
Jun 17, 2025
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OPPO
Oct 31, 2024
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Description
OPPO
May 31, 2024
Description
OPPO
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Mar 28, 2023
Feb 16, 2023
Decision to grant a European patent
Search/Exam
Jan 17, 2023
(Electronic) Receipt
Search/Exam
Jan 17, 2023
Filing of the translations of the claims
Search/Exam
Jan 17, 2023
French translation of claims
Search/Exam
Jan 17, 2023
German translation of the claims
Search/Exam
Jan 17, 2023
Letter accompanying subsequently filed items
Search/Exam
Sep 16, 2022
Sep 16, 2022
Sep 16, 2022
Intention to grant (signatures)
Search/Exam
Sep 16, 2022
Text intended for grant (clean copy)
Search/Exam
Sep 16, 2022
Aug 19, 2022
Examination started
Search/Exam
Jun 13, 2022
May 10, 2022
Notification of the recording of a change
Search/Exam
May 4, 2022
Mar 8, 2022
Feb 25, 2022
(Electronic) Receipt
Search/Exam
Feb 25, 2022
Feb 25, 2022
Amendments received before examination
Search/Exam
Feb 25, 2022
Request for entry into the European phase
Search/Exam
Sep 10, 2021
Notification of election of EPO
Search/Exam
Sep 2, 2021
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PCT demand form
PCT2
Aug 11, 2021
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Jun 28, 2021
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Jun 10, 2021
Copy of the international search report
Search/Exam
Jun 10, 2021
Published international application - A1
Search/Exam
Feb 19, 2021
ISR: cited documents
PCTISA
Feb 19, 2021
Feb 19, 2021
Feb 19, 2021
Jan 12, 2021
Dec 16, 2020
Abstract
PCTISA
Dec 16, 2020
Claims
PCTISA
Dec 16, 2020
Description
PCTISA
Dec 16, 2020
Dec 16, 2020
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Dec 16, 2020