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The patent EP3575985 was granted to Nabla Wind Power on Nov 25, 2020. The application was filed on Jul 22, 2013 under application number EP19184468A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| ENERCON | Aug 25, 2021 | EISENFUHR SPEISER | ADMISSIBLE |
| AERO DYNAMIK CONSULT INGENIEURSGESELLSCHAFT INGENIEURBURO AXEL ANDREA CONSULTING & ENGINEERING WINDWISEPECONCEPTS W | Aug 24, 2021 | SPACHMANN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2012107051 |
| DESCRIPTION | WO2012160370 |
| OPPOSITION | US2010138267 |
| OPPOSITION | WO2004088285 |
| OPPOSITION | WO2011143531 |
| SEARCH | EP2325480 |
| SEARCH | US2009180875 |
| SEARCH | US2010138267 |
| SEARCH | US2010298995 |
| SEARCH | WO2011143531 |
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.
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Decision to grant a European patent
Search/Exam
Oct 19, 2020
(Electronic) Receipt
Search/Exam
Oct 19, 2020
Filing of the translations of the claims
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Oct 19, 2020
French translation of claims
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Oct 19, 2020
German translation of the claims
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Oct 19, 2020
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Jun 19, 2020
Text intended for grant (clean copy)
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Examination started
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Feb 7, 2020
(Electronic) Receipt
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Feb 7, 2020
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Amended description with annotations
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Feb 7, 2020
Amendments received before examination
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Feb 7, 2020
Letter accompanying subsequently filed items
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Dec 9, 2019
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Notification of forthcoming publication
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Sep 17, 2019
Communication to designated inventor
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Aug 20, 2019
Refund of fees
Search/Exam
Aug 19, 2019
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European search opinion
Search/Exam
Aug 19, 2019
European search report
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Aug 19, 2019
Information on Search Strategy
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Aug 7, 2019
Search started
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Jul 26, 2019
(Electronic) Receipt
Search/Exam
Jul 26, 2019
Designation of inventor
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Jul 26, 2019
Letter accompanying subsequently filed items
Search/Exam
Jul 26, 2019
Letter concerning the inventor
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Jul 25, 2019
(Electronic) Receipt
Search/Exam
Jul 25, 2019
Letter accompanying subsequently filed items
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Letter concerning fees and payments
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Jul 4, 2019
Abstract
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Jul 4, 2019
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Claims
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Jul 4, 2019
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Description
Search/Exam
Jul 4, 2019
Drawings
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Jul 4, 2019
Matter concerning the application
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Jul 4, 2019
Request for grant of a European patent
Search/Exam
Jul 4, 2019
Submission concerning representation
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