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The patent EP3913037 was granted to Ensyn Renewables on Sep 27, 2023. The application was filed on Dec 11, 2012 under application number EP21185046A. 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 |
|---|---|---|---|
| TECHNIP ENERGIES FRANCE BTG BIOLIQUIDS | Aug 18, 2023 | LAVOIX | WITHDRAWN |
| TOTALENERGIES ONETECH | Aug 18, 2023 | LAVOIX | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US5792340 |
| DESCRIPTION | US5961786 |
| DESCRIPTION | US7905990 |
| OPPOSITION | US2010222620 |
| OPPOSITION | US2011224471 |
| OPPOSITION | US2012204481 |
| OPPOSITION | US5792340 |
| OPPOSITION | US5961786 |
| OPPOSITION | US7905990 |
| OPPOSITION | WO2010002792 |
| OPPOSITION | WO2012062924 |
| OPPOSITION | WO2012091815 |
| SEARCH | US2010222620 |
| SEARCH | US2011224471 |
| SEARCH | WO2010002792 |
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 3, 2025
Jun 26, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Notice of appeal
Appeal
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Means of redress
OPPO
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Letter concerning publication issues
Search/Exam
Jun 29, 2023
(Electronic) Receipt
Search/Exam
Jun 29, 2023
Amended description with annotations
Search/Exam
Jun 29, 2023
Description
Search/Exam
Jun 29, 2023
Letter accompanying subsequently filed items
Search/Exam
Jun 29, 2023
Request for correction of the publication
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May 17, 2023
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Letter concerning publication issues
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Apr 26, 2023
Letter concerning publication issues
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Apr 26, 2023
Letter concerning publication issues
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Jan 12, 2023
(Electronic) Receipt
Search/Exam
Jan 12, 2023
Amended description with annotations
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Jan 12, 2023
Description
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Letter accompanying subsequently filed items
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Jan 12, 2023
Request for correction of the publication
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Dec 9, 2022
Refund of fees
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Dec 6, 2022
Oct 27, 2022
Decision to grant a European patent
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Oct 14, 2022
(Electronic) Receipt
Search/Exam
Oct 14, 2022
Filing of the translations of the claims
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Oct 14, 2022
French translation of claims
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Oct 14, 2022
German translation of the claims
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Oct 14, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 17, 2022
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Intention to grant (signatures)
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Jun 17, 2022
Text intended for grant (clean copy)
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Jun 17, 2022
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Observations by third parties
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Apr 14, 2022
Observations by third parties
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(Electronic) Receipt
Search/Exam
Mar 24, 2022
Description
Search/Exam
Mar 24, 2022
Letter accompanying subsequently filed items
Search/Exam
Mar 24, 2022
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Intention to grant (signatures)
Search/Exam
Mar 14, 2022
Text intended for grant (clean copy)
Search/Exam
Mar 14, 2022
Dec 9, 2021
(Electronic) Receipt
Search/Exam
Dec 9, 2021
Annex
Search/Exam
Dec 9, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 9, 2021
Nov 29, 2021
Nov 25, 2021
Annex to the communication
Search/Exam
Nov 25, 2021
Communication from the Examining Division
Search/Exam
Nov 22, 2021
Examination started
Search/Exam
Oct 27, 2021
Notification of forthcoming publication
Search/Exam
Sep 23, 2021
(Electronic) Receipt
Search/Exam
Sep 23, 2021
Annex
Search/Exam
Sep 23, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 23, 2021
Sep 23, 2021
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Sep 23, 2021
Reply to Written Opinion prepared by the EPO
Search/Exam
Aug 20, 2021
Refund of fees
Search/Exam
Aug 16, 2021
Aug 16, 2021
European search opinion
Search/Exam
Aug 16, 2021
European search report
Search/Exam
Aug 16, 2021
Information on Search Strategy
Search/Exam
Aug 3, 2021
Search started
Search/Exam
Jul 12, 2021
Abstract
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Jul 12, 2021
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Claims
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Jul 12, 2021
Description
Search/Exam
Jul 12, 2021
Designation of inventor
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Jul 12, 2021
Drawings
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Jul 12, 2021
Request for grant of a European patent
Search/Exam
Jan 7, 2015
Jul 12, 2013
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