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The patent EP3620482 was granted to Arkema France on Sep 18, 2024. The application was filed on May 2, 2017 under application number EP19205538A. 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 |
|---|---|---|---|
| VICTREX MANUFACTURING | Jun 17, 2025 | GURUN | ADMISSIBLE |
| SOLVAY SPECIALTY POLYMERS USA | Jun 13, 2025 | VIOLA | ADMISSIBLE |
| SYENSQO SPECIALTY POLYMERS USA | Jun 13, 2025 | VIOLA | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US4698393 |
| DESCRIPTION | US4716211 |
| DESCRIPTION | US4716556 |
| DESCRIPTION | US4816556 |
| DESCRIPTION | US4841013 |
| DESCRIPTION | US4912181 |
| DESCRIPTION | WO2011004164 |
| DESCRIPTION | WO2014013202 |
| DESCRIPTION | WO9500446 |
| OPPOSITION | CN1974631 |
| OPPOSITION | US2005085597 |
| OPPOSITION | US2008085990 |
| OPPOSITION | US2015183918 |
| OPPOSITION | US4808693 |
| OPPOSITION | US4874839 |
| OPPOSITION | US4874840 |
| OPPOSITION | US5017685 |
| OPPOSITION | WO02096974 |
| OPPOSITION | WO2015124903 |
| OTHER | WO2014013202 |
| SEARCH | US4611033 |
| SEARCH | US4698393 |
| SEARCH | WO2013085947 |
| SEARCH | WO2014013202 |
| SEARCH | WO2014191674 |
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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Letter accompanying subsequently filed items
Search/Exam
Apr 1, 2025
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Aug 22, 2024
Decision to grant a European patent
Search/Exam
Aug 12, 2024
(Electronic) Receipt
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Aug 12, 2024
English translation of the claims
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Aug 12, 2024
Filing of the translations of the claims
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Aug 12, 2024
German translation of the claims
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Aug 12, 2024
Letter accompanying subsequently filed items
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Jun 10, 2024
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Intention to grant (signatures)
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Jun 10, 2024
Text intended for grant (clean copy)
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Jun 10, 2024
Sep 12, 2023
(Electronic) Receipt
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Sep 12, 2023
Amended claims with annotations
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Sep 12, 2023
Claims
Search/Exam
Sep 12, 2023
Letter accompanying subsequently filed items
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Sep 12, 2023
May 2, 2023
Annex to the communication
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May 2, 2023
Communication from the Examining Division
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Apr 21, 2023
Examination started
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Oct 26, 2022
Oct 21, 2022
Observations by third parties
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Sep 23, 2021
Sep 18, 2021
Observations by third parties
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Sep 11, 2020
(Electronic) Receipt
Search/Exam
Sep 11, 2020
Sep 11, 2020
Amended claims with annotations
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Sep 11, 2020
Amendments received before examination
Search/Exam
Sep 11, 2020
Letter accompanying subsequently filed items
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Jul 16, 2020
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Feb 12, 2020
Notification of forthcoming publication
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Dec 20, 2019
Communication to designated inventor
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Dec 20, 2019
Communication to designated inventor
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Dec 20, 2019
Communication to designated inventor
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Dec 20, 2019
Communication to designated inventor
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Nov 20, 2019
Refund of fees
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Nov 19, 2019
Nov 19, 2019
European search opinion
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Nov 19, 2019
European search report
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Nov 19, 2019
Information on Search Strategy
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Nov 12, 2019
Search started
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Nov 5, 2019
Priority search results copy provided by EPO
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Oct 28, 2019
Abstract
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Oct 28, 2019
Oct 28, 2019
Claims
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Oct 28, 2019
Description
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Oct 28, 2019
Designation of inventor
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Oct 28, 2019
Request for grant of a European patent
Search/Exam
Dec 11, 2018
Priority search results copy provided by EPO
Search/Exam
Dec 6, 2017