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The patent EP3791064 was granted to Siemens Gamesa Renewable Energy on Aug 27, 2025. The application was filed on Jun 4, 2019 under application number EP19729695A. 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 |
|---|---|---|---|
| GE WIND ENERGY | Mar 28, 2023 | DE ROOIJ | ADMISSIBLE |
| VESTAS WIND SYSTEMS | Mar 28, 2023 | SAMSON & PARTNER PATENTANWALTE MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP2405133 |
| INTERNATIONAL-SEARCH-REPORT | EP3037657 |
| INTERNATIONAL-SEARCH-REPORT | EP3159537 |
| OPPOSITION | DE102010026244 |
| OPPOSITION | EP2063108 |
| OPPOSITION | EP2128438 |
| OPPOSITION | EP2767710 |
| OPPOSITION | EP3023636 |
| OPPOSITION | US2009099702 |
| OPPOSITION | US2012133138 |
| OPPOSITION | US2013166082 |
| OPPOSITION | US2013300115 |
| OPPOSITION | US2015308416 |
| OPPOSITION | US2016146190 |
| OPPOSITION | US2016230741 |
| OPPOSITION | US7357622 |
| OPPOSITION | US9512820 |
| OPPOSITION | WO2017042191 |
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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Refund of fees
Appeal
Apr 25, 2025
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(Electronic) Receipt
Appeal
Apr 21, 2025
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Withdrawal of an appeal
Appeal
Mar 31, 2025
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(Electronic) Receipt
Appeal
Mar 24, 2025
Notice of appeal
Appeal
Mar 24, 2025
Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
May 17, 2022
May 11, 2022
(Electronic) Receipt
Search/Exam
May 11, 2022
Filing of the translations of the claims
Search/Exam
May 11, 2022
French translation of claims
Search/Exam
May 11, 2022
German translation of the claims
Search/Exam
Feb 18, 2022
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Intention to grant (signatures)
Search/Exam
Feb 18, 2022
Text intended for grant (clean copy)
Search/Exam
Feb 18, 2022
Nov 18, 2021
Examination started
Search/Exam
May 19, 2021
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Communication to designated inventor
Search/Exam
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Priority search results copy provided by EPO
Search/Exam
Dec 7, 2020
(Electronic) Receipt
Search/Exam
Dec 7, 2020
Request for entry into the European phase
Search/Exam
Oct 16, 2020
Information on entry into European phase
Search/Exam
Jan 3, 2020
Dec 12, 2019
Copy of the international search report
Search/Exam
Dec 12, 2019
Published international application - A1
Search/Exam
Jun 11, 2019
Jun 4, 2019
(Electronic) Receipt
PCTRO
Jun 4, 2019
Abstract
PCTRO
Jun 4, 2019
Claims
PCTRO
Jun 4, 2019
Description
PCTRO
Jun 4, 2019
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Drawings
PCTRO
Jun 4, 2019
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