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The patent EP3971138 was granted to Solvay on May 29, 2024. The application was filed on Nov 12, 2014 under application number EP21178120A. 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 |
|---|---|---|---|
| WE SODA | Feb 13, 2025 | HOYNG ROKH MONEGIER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP20130192428 |
| DESCRIPTION | US2003143149 |
| DESCRIPTION | US2004057892 |
| DESCRIPTION | US2005274678 |
| DESCRIPTION | US2009291038 |
| DESCRIPTION | US3184287 |
| DESCRIPTION | US7507388 |
| OPPOSITION | EP2878579 |
| OPPOSITION | EP3196165 |
| OPPOSITION | US3184287 |
| OPPOSITION | US4039617 |
| OPPOSITION | US5283054 |
| OPPOSITION | US5609838 |
| SEARCH | US3184287 |
| SEARCH | US5609838 |
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
Apr 19, 2024
Refund of fees
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Apr 17, 2024
(Electronic) Receipt
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Apr 17, 2024
Amended claims with annotations
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Apr 17, 2024
Filing of the translations of the claims
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Apr 17, 2024
French translation of claims
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Apr 17, 2024
Letter accompanying subsequently filed items
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Apr 11, 2024
(Electronic) Receipt
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Apr 11, 2024
Filing of the translations of the claims
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Apr 11, 2024
German translation of the claims
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Apr 11, 2024
Letter accompanying subsequently filed items
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Apr 11, 2024
Translation of the claims
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Jan 3, 2024
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Intention to grant (signatures)
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Dec 12, 2023
Letter accompanying subsequently filed items
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Dec 12, 2023
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Text intended for grant (clean copy)
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Dec 12, 2023
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Annexes in respect of a client data request
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Dec 4, 2023
Letter accompanying subsequently filed items
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Decision to allow further processing
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Nov 13, 2023
(Electronic) Receipt
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Nov 13, 2023
Amended claims with annotations
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Nov 13, 2023
Claims
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Nov 13, 2023
Letter accompanying subsequently filed items
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Nov 13, 2023
Request for further processing
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Intention to grant (signatures)
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Mar 16, 2023
Text intended for grant (clean copy)
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Mar 16, 2023
Feb 7, 2023
Examination started
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Mar 28, 2022
Feb 25, 2022
Refund of fees
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Feb 23, 2022
Notification of forthcoming publication
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Feb 22, 2022
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European search opinion
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Feb 22, 2022
European search report
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Feb 22, 2022
Information on Search Strategy
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Feb 10, 2022
Search started
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Sep 28, 2021
(Electronic) Receipt
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Sep 28, 2021
Claims
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Sep 28, 2021
Letter accompanying subsequently filed items
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Sep 28, 2021
Matter concerning the application
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Jul 19, 2021
Invitation to file claims
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Jun 11, 2021
Priority search results copy provided by EPO
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Jun 8, 2021
Abstract
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Jun 8, 2021
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Description
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Jun 8, 2021
Designation of inventor
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Jun 8, 2021
Drawings
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Jun 8, 2021
Request for grant of a European patent
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Apr 30, 2015
Priority search results copy provided by EPO
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Jan 13, 2015