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The patent EP3255274 was granted to Gamesa Innovation & Technology on Nov 4, 2020. The application was filed on Jun 6, 2017 under application number EP17000950A. 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 |
|---|---|---|---|
| LM WP PATENT HOLDING LM WIND POWER | Aug 4, 2021 | COPA COPENHAGEN PATENTS | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2006051147 |
| OPPOSITION | EP1154537 |
| OPPOSITION | EP1826402 |
| OPPOSITION | EP2458207 |
| OPPOSITION | EP2518312 |
| OPPOSITION | EP2857678 |
| OPPOSITION | EP2930355 |
| OPPOSITION | EP3091228 |
| OPPOSITION | EP3106657 |
| OPPOSITION | EP3173619 |
| OPPOSITION | EP3184814 |
| OPPOSITION | WO0014405 |
| OPPOSITION | WO2005026538 |
| OPPOSITION | WO2005050808 |
| OPPOSITION | WO2015055213 |
| OPPOSITION | WO2015055214 |
| SEARCH | DE4445899 |
| SEARCH | EP2458207 |
| SEARCH | EP2930355 |
| SEARCH | JP2010059813 |
| SEARCH | US2013149153 |
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 2, 2025
Dec 2, 2025
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Nov 12, 2025
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Oct 9, 2025
Oct 8, 2025
(Electronic) Receipt
Appeal
Oct 8, 2025
Oct 8, 2025
Oct 6, 2025
(Electronic) Receipt
Appeal
Oct 6, 2025
Authorisation
Appeal
Oct 6, 2025
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Sep 4, 2025
(Electronic) Receipt
Appeal
Sep 4, 2025
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(Electronic) Receipt
Appeal
Aug 14, 2025
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(Electronic) Receipt
Appeal
Jun 18, 2025
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(Electronic) Receipt
Appeal
May 20, 2025
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(Electronic) Receipt
Appeal
Dec 23, 2024
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Sep 16, 2024
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(Electronic) Receipt
Appeal
Jan 12, 2024
Jan 12, 2024
Reply to appeal
Appeal
Sep 13, 2023
Sep 7, 2023
(Electronic) Receipt
Appeal
Sep 7, 2023
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(Electronic) Receipt
Appeal
Jul 3, 2023
Jul 3, 2023
Notice of appeal
Appeal
May 22, 2023
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Means of redress
OPPO
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Authorisation
OPPO
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Nov 16, 2020
Oct 8, 2020
Decision to grant a European patent
Search/Exam
Sep 23, 2020
(Electronic) Receipt
Search/Exam
Sep 23, 2020
French translation of claims
Search/Exam
Sep 23, 2020
German translation of the claims
Search/Exam
Sep 23, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 3, 2020
Jun 3, 2020
Jun 3, 2020
Intention to grant (signatures)
Search/Exam
Jun 3, 2020
Text intended for grant (clean copy)
Search/Exam
Jun 3, 2020
Apr 15, 2020
Examination started
Search/Exam
Mar 13, 2019
Mar 13, 2019
Feb 20, 2019
Annexes in respect of a client data request
Search/Exam
Jan 15, 2019
Dec 19, 2018
Jun 13, 2018
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Amended claims with annotations
Search/Exam
Jun 13, 2018
Jun 13, 2018
Amended description with annotations
Search/Exam
Jun 13, 2018
Amendments received before examination
Search/Exam
May 24, 2018
Letter concerning fees and payments
Search/Exam
May 24, 2018
Payment of fees and costs
Search/Exam
Dec 18, 2017
Nov 15, 2017
Notification of forthcoming publication
Search/Exam
Oct 25, 2017
Oct 25, 2017
European search opinion
Search/Exam
Oct 25, 2017
European search report
Search/Exam
Oct 25, 2017
Information on Search Strategy
Search/Exam
Oct 9, 2017
Search started
Search/Exam
Aug 18, 2017
Communication to designated inventor
Search/Exam
Aug 18, 2017
Communication to designated inventor
Search/Exam
Jul 20, 2017
Drawings
Search/Exam
Jul 7, 2017
Jun 26, 2017
Letter concerning fees and payments
Search/Exam
Jun 6, 2017
Abstract
Search/Exam
Jun 6, 2017
Claims
Search/Exam
Jun 6, 2017
Description
Search/Exam
Jun 6, 2017
Designation of inventor
Search/Exam
Jun 6, 2017
Drawings
Search/Exam
Jun 6, 2017
Matter concerning the application
Search/Exam
Jun 6, 2017
Payment of fees and costs
Search/Exam
Jun 6, 2017
Priority document
Search/Exam
Jun 6, 2017
Request for grant of a European patent
Search/Exam