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The patent EP3791066 was granted to Siemens Gamesa Renewable Energy on May 7, 2025. The application was filed on Jun 25, 2019 under application number EP19739892A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| LM WIND POWER | Mar 14, 2023 | DE ROOIJ | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | RU2267690 |
| DESCRIPTION | WO2017103308 |
| INTERNATIONAL-SEARCH-REPORT | EP2908002 |
| INTERNATIONAL-SEARCH-REPORT | RU2267690 |
| INTERNATIONAL-SEARCH-REPORT | US2013164144 |
| INTERNATIONAL-SEARCH-REPORT | WO2017103308 |
| OPPOSITION | DE202009002054U |
| OPPOSITION | WO2010051817 |
| OPPOSITION | WO2015121408 |
| OPPOSITION | WO2015155507 |
| OPPOSITION | WO2015161028 |
| OPPOSITION | WO2017059865 |
| OPPOSITION | WO2017103308 |
| OPPOSITION | WO2017194940 |
| OPPOSITION | WO2018149528 |
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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Apr 10, 2025
Apr 10, 2025
Apr 2, 2025
Apr 2, 2025
Apr 2, 2025
Apr 2, 2025
Feb 12, 2025
Feb 12, 2025
Feb 7, 2025
Refund of fees
Appeal
Feb 6, 2025
Feb 5, 2025
Feb 5, 2025
Jan 31, 2025
(Electronic) Receipt
Appeal
Jan 31, 2025
Jan 31, 2025
Jan 31, 2025
Withdrawal of an appeal
Appeal
Jan 13, 2025
Jan 13, 2025
Jan 2, 2025
(Electronic) Receipt
Appeal
Jan 2, 2025
Notice of appeal
Appeal
Jan 2, 2025
Notice of appeal
Appeal
Oct 29, 2024
Oct 29, 2024
Oct 29, 2024
Oct 29, 2024
Oct 29, 2024
Oct 29, 2024
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Means of redress
OPPO
Oct 29, 2024
Oct 29, 2024
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Jan 4, 2024
Dec 28, 2023
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Description
OPPO
Dec 22, 2023
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Dec 14, 2023
Dec 14, 2023
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Sep 7, 2022
Aug 31, 2022
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May 19, 2022
Decision to grant a European patent
Search/Exam
May 3, 2022
(Electronic) Receipt
Search/Exam
May 3, 2022
French translation of claims
Search/Exam
May 3, 2022
German translation of the claims
Search/Exam
May 3, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 18, 2022
Feb 18, 2022
Feb 18, 2022
Intention to grant (signatures)
Search/Exam
Feb 18, 2022
Text intended for grant (clean copy)
Search/Exam
Feb 18, 2022
Jan 25, 2022
Examination started
Search/Exam
Jul 12, 2021
(Electronic) Receipt
Search/Exam
Jul 12, 2021
Jul 12, 2021
Amended claims with annotations
Search/Exam
Jul 12, 2021
Jul 12, 2021
Amended description with annotations
Search/Exam
Jul 12, 2021
Amendments received before examination
Search/Exam
Jul 12, 2021
Letter accompanying subsequently filed items
Search/Exam
May 19, 2021
May 6, 2021
Feb 17, 2021
Jan 11, 2021
Jan 11, 2021
Dec 22, 2020
Communication to designated inventor
Search/Exam
Dec 17, 2020
Priority search results copy provided by EPO
Search/Exam
Dec 16, 2020
Dec 10, 2020
(Electronic) Receipt
Search/Exam
Dec 10, 2020
Request for entry into the European phase
Search/Exam
Nov 6, 2020
Information on entry into European phase
Search/Exam
Jan 31, 2020
Jan 2, 2020
Copy of the international search report
Search/Exam
Jan 2, 2020
Published international application - A1
Search/Exam
Aug 30, 2019
ISR: cited documents
PCTISA
Aug 30, 2019
Aug 30, 2019
Aug 30, 2019
Jul 29, 2019
Jul 23, 2019
Jun 28, 2019
Jun 25, 2019
(Electronic) Receipt
PCTRO
Jun 25, 2019
Abstract
PCTRO
Jun 25, 2019
Claims
PCTRO
Jun 25, 2019
Description
PCTRO
Jun 25, 2019
Jun 25, 2019
Drawings
PCTRO
Jun 25, 2019
Jun 25, 2019
Jun 25, 2019