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The patent EP3788256 was granted to Vestas Wind Systems on Dec 7, 2022. The application was filed on Apr 26, 2019 under application number EP19721983A. 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 |
|---|---|---|---|
| GE WIND ENERGY | Sep 7, 2023 | DE ROOIJ | ADMISSIBLE |
| LIEBHERR COMPONENTS BIBERACH | Sep 7, 2023 | THOMA | ADMISSIBLE |
| THYSSENKRUPP ROTHE ERDE GERMANY | Sep 5, 2023 | THYSSENKRUPP | ADMISSIBLE |
| SUZLON ENERGY GERMAN BRANCH | Aug 31, 2023 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US8282353 |
| EXAMINATION | EP2094981 |
| INTERNATIONAL-SEARCH-REPORT | EP2094981 |
| INTERNATIONAL-SEARCH-REPORT | US2008213095 |
| INTERNATIONAL-SEARCH-REPORT | US2010084079 |
| INTERNATIONAL-SEARCH-REPORT | US2012243819 |
| INTERNATIONAL-SEARCH-REPORT | US2012263598 |
| OPPOSITION | DE102005026141 |
| OPPOSITION | DE102015112056 |
| OPPOSITION | DE1575433 |
| OPPOSITION | DE2647588 |
| OPPOSITION | DE3034008 |
| OPPOSITION | EP2094981 |
| OPPOSITION | US10125812 |
| OPPOSITION | US2008213095 |
| OPPOSITION | US2010084079 |
| OPPOSITION | US2012243819 |
| OPPOSITION | US2012263598 |
| OPPOSITION | US4989999 |
| OPPOSITION | US8282353 |
| OPPOSITION | US9422976 |
| OPPOSITION | WO03082551 |
| OPPOSITION | WO2007082532 |
| OPPOSITION | WO2008074322 |
| OPPOSITION | WO2009103473 |
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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Nov 12, 2025
Nov 12, 2025
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Nov 7, 2025
(Electronic) Receipt
Appeal
Nov 7, 2025
(Electronic) Receipt
Appeal
Nov 7, 2025
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Reply to appeal
Appeal
Nov 7, 2025
Reply to appeal
Appeal
Nov 6, 2025
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Nov 3, 2025
(Electronic) Receipt
Appeal
Nov 3, 2025
(Electronic) Receipt
Appeal
Nov 3, 2025
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Reply to appeal
Appeal
Nov 3, 2025
Reply to appeal
Appeal
Oct 22, 2025
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Jul 9, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
May 3, 2025
Notice of appeal
Appeal
May 3, 2025
Notice of appeal
Appeal
May 2, 2025
(Electronic) Receipt
Appeal
May 2, 2025
Notice of appeal
Appeal
Apr 30, 2025
(Electronic) Receipt
Appeal
Apr 30, 2025
Notice of appeal
Appeal
Apr 30, 2025
Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Oct 27, 2022
(Electronic) Receipt
Search/Exam
Oct 27, 2022
French translation of claims
Search/Exam
Oct 27, 2022
German translation of the claims
Search/Exam
Oct 27, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 14, 2022
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Intention to grant (signatures)
Search/Exam
Jul 14, 2022
Text intended for grant (clean copy)
Search/Exam
Jul 14, 2022
Jun 22, 2022
Examination started
Search/Exam
May 20, 2021
(Electronic) Receipt
Search/Exam
May 20, 2021
May 20, 2021
Amended claims with annotations
Search/Exam
May 20, 2021
Amendments received before examination
Search/Exam
May 20, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 10, 2021
Dec 8, 2020
Dec 4, 2020
Communication to designated inventor
Search/Exam
Dec 4, 2020
Communication to designated inventor
Search/Exam
Dec 4, 2020
Communication to designated inventor
Search/Exam
Dec 4, 2020
Communication to designated inventor
Search/Exam
Nov 16, 2020
Nov 2, 2020
(Electronic) Receipt
Search/Exam
Nov 2, 2020
Request for entry into the European phase
Search/Exam
Sep 11, 2020
Information on entry into European phase
Search/Exam
Nov 26, 2019
Nov 7, 2019
Copy of the international search report
Search/Exam
Nov 7, 2019
Published international application - A1
Search/Exam
Jul 23, 2019
ISR: cited documents
PCTISA
Jul 23, 2019
Jul 23, 2019
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May 20, 2019
May 4, 2019
Abstract
PCTISA
May 4, 2019
Claims
PCTISA
May 4, 2019
Description
PCTISA
May 4, 2019
Drawings
PCTISA
May 4, 2019