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The patent EP3727784 was granted to Nova Chemicals on Sep 20, 2023. The application was filed on Dec 13, 2018 under application number EP18839540A. 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 |
|---|---|---|---|
| TOTALENERGIES ONE TECH | Jun 20, 2024 | DE CLERCQ & PARTNERS | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2004016715 |
| DESCRIPTION | US2006047078 |
| DESCRIPTION | US2008118749 |
| DESCRIPTION | US2008197135 |
| DESCRIPTION | US2013225743 |
| DESCRIPTION | US2015203671 |
| DESCRIPTION | US2017002186 |
| DESCRIPTION | US2017130040 |
| DESCRIPTION | US3904062 |
| DESCRIPTION | US4474302 |
| DESCRIPTION | US4557393 |
| DESCRIPTION | US4564114 |
| DESCRIPTION | US4573602 |
| DESCRIPTION | US4583652 |
| DESCRIPTION | US4805792 |
| DESCRIPTION | US5342868 |
| DESCRIPTION | US5725115 |
| DESCRIPTION | US5981636 |
| DESCRIPTION | US6465551 |
| DESCRIPTION | US6599971 |
| DESCRIPTION | US7737220 |
| DESCRIPTION | US8443994 |
| DESCRIPTION | US8720716 |
| DESCRIPTION | US9493283 |
| DESCRIPTION | US9587093 |
| DESCRIPTION | US9644087 |
| DESCRIPTION | US9776779 |
| DESCRIPTION | USD593856S |
| DESCRIPTION | WO2006048253 |
| DESCRIPTION | WO2006048254 |
| DESCRIPTION | WO2011050042 |
| DESCRIPTION | WO2015042561 |
| DESCRIPTION | WO2015042562 |
| DESCRIPTION | WO2015042563 |
| DESCRIPTION | WO2015061834 |
| INTERNATIONAL-SEARCH-REPORT | EP1790580 |
| INTERNATIONAL-SEARCH-REPORT | US2015203671 |
| INTERNATIONAL-SEARCH-REPORT | US2015251827 |
| INTERNATIONAL-SEARCH-REPORT | WO2017029571 |
| INTERNATIONAL-SEARCH-REPORT | WO2018055493 |
| OTHER | WO2018055493 |
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
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Aug 8, 2023
(Electronic) Receipt
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Aug 8, 2023
Filing of the translations of the claims
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Aug 8, 2023
French translation of claims
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Aug 8, 2023
German translation of the claims
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Aug 8, 2023
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Apr 5, 2023
Text intended for grant (clean copy)
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(Electronic) Receipt
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Amended claims with annotations
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Claims
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Jan 23, 2023
Description
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Jan 23, 2023
Letter accompanying subsequently filed items
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Annex to the communication
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Oct 5, 2022
Communication from the Examining Division
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Jul 20, 2022
(Electronic) Receipt
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Jul 20, 2022
Amended claims with annotations
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Claims
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Letter accompanying subsequently filed items
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Annex to the communication
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Jun 9, 2022
Communication from the Examining Division
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(Electronic) Receipt
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Amended claims with annotations
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Claims
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Letter accompanying subsequently filed items
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Annex to the communication
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Jan 21, 2022
Communication from the Examining Division
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Jan 17, 2022
Examination started
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Nov 2, 2021
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(Electronic) Receipt
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Oct 26, 2021
Letter accompanying subsequently filed items
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Oct 26, 2021
Observations by third parties
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Feb 8, 2021
(Electronic) Receipt
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Feb 8, 2021
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Amended claims with annotations
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Amended description with annotations
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Feb 8, 2021
Amendments received before examination
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Feb 8, 2021
Letter accompanying subsequently filed items
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jul 6, 2020
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Information regarding early processing
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May 4, 2020
(Electronic) Receipt
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May 4, 2020
Information on entry into European phase
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May 4, 2020
Request for entry into the European phase
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Jul 19, 2019
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Copy of the international search report
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Jun 27, 2019
Published international application - A1
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