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The patent EP3609955 was granted to Solvay Specialty Polymers USA on Jan 26, 2022. The application was filed on Apr 9, 2018 under application number EP18717892A. 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 | Oct 26, 2022 | ARKEMA PATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2015210835 |
| INTERNATIONAL-SEARCH-REPORT | US2016122510 |
| OPPOSITION | EP2703435 |
| OPPOSITION | WO2014195226 |
| OPPOSITION | WO2015132510 |
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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Dec 19, 2025
Dec 19, 2025
Dec 19, 2025
Dec 18, 2025
(Electronic) Receipt
Appeal
Dec 18, 2025
Dec 18, 2025
Dec 4, 2025
Dec 1, 2025
(Electronic) Receipt
Appeal
Dec 1, 2025
Dec 1, 2025
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Oct 30, 2025
(Electronic) Receipt
Appeal
Oct 30, 2025
Oct 30, 2025
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(Electronic) Receipt
Appeal
Sep 16, 2025
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Jul 30, 2025
Jul 25, 2025
(Electronic) Receipt
Appeal
Jul 25, 2025
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Jan 17, 2025
(Electronic) Receipt
Appeal
Jan 17, 2025
Jan 17, 2025
Jan 17, 2025
Reply to appeal
Appeal
Nov 26, 2024
Nov 26, 2024
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Nov 20, 2024
(Electronic) Receipt
Appeal
Nov 20, 2024
Authorisation
Appeal
Nov 20, 2024
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Oct 29, 2024
(Electronic) Receipt
Appeal
Oct 29, 2024
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Sep 13, 2024
(Electronic) Receipt
Appeal
Sep 13, 2024
(Electronic) Receipt
Appeal
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Jul 11, 2024
(Electronic) Receipt
Appeal
Jul 11, 2024
Notice of appeal
Appeal
Jul 10, 2024
(Electronic) Receipt
Appeal
Jul 10, 2024
Jul 10, 2024
Notice of appeal
Appeal
May 13, 2024
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Means of redress
Search/Exam
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Feb 8, 2022
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Decision to grant a European patent
Search/Exam
Dec 21, 2021
(Electronic) Receipt
Search/Exam
Dec 21, 2021
Filing of the translations of the claims
Search/Exam
Dec 21, 2021
French translation of claims
Search/Exam
Dec 21, 2021
German translation of the claims
Search/Exam
Dec 21, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 29, 2021
Sep 29, 2021
Sep 29, 2021
Intention to grant (signatures)
Search/Exam
Sep 29, 2021
Text intended for grant (clean copy)
Search/Exam
Sep 29, 2021
Jun 25, 2021
(Electronic) Receipt
Search/Exam
Jun 25, 2021
Amended claims with annotations
Search/Exam
Jun 25, 2021
Claims
Search/Exam
Jun 25, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 25, 2021
Mar 18, 2021
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Mar 18, 2021
Intention to grant (signatures)
Search/Exam
Mar 18, 2021
Text intended for grant (clean copy)
Search/Exam
Mar 18, 2021
Dec 21, 2020
(Electronic) Receipt
Search/Exam
Dec 21, 2020
Amended claims with annotations
Search/Exam
Dec 21, 2020
Claims
Search/Exam
Dec 21, 2020
Letter accompanying subsequently filed items
Search/Exam
Dec 21, 2020
Sep 7, 2020
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Sep 7, 2020
Intention to grant (signatures)
Search/Exam
Sep 7, 2020
Text intended for grant (clean copy)
Search/Exam
Sep 7, 2020
Aug 17, 2020
Examination started
Search/Exam
Jan 22, 2020
Nov 20, 2019
Nov 18, 2019
Communication to designated inventor
Search/Exam
Nov 18, 2019
Communication to designated inventor
Search/Exam
Nov 18, 2019
Communication to designated inventor
Search/Exam
Nov 13, 2019
Priority search results copy provided by EPO
Search/Exam
Oct 29, 2019
Oct 14, 2019
(Electronic) Receipt
Search/Exam
Oct 14, 2019
Request for entry into the European phase
Search/Exam
Aug 23, 2019
Information on entry into European phase
Search/Exam
Nov 7, 2018
Nov 7, 2018
Oct 18, 2018
Copy of the international search report
Search/Exam
Oct 18, 2018
Published international application - A1
Search/Exam
Aug 13, 2018
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Jun 22, 2018
ISR: cited documents
PCTISA
Jun 21, 2018
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Apr 27, 2018
Apr 9, 2018
(Electronic) Receipt
PCTRO
Apr 9, 2018
Abstract
PCTRO
Apr 9, 2018
Claims
PCTRO
Apr 9, 2018
Description
PCTRO
Apr 9, 2018
Apr 9, 2018
Apr 9, 2018