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The patent EP2791500 was granted to Vestas Wind Systems on Mar 6, 2019. The application was filed on Dec 11, 2012 under application number EP12805931A. 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 | Dec 6, 2019 | EISENFUHR SPEISER | ADMISSIBLE |
| NORDEX ENERGY | Dec 6, 2019 | HAUCK | ADMISSIBLE |
| NORDEX ENERGY | Dec 6, 2019 | HAUCK PATENTANWALTSPARTNERSCHAFT MBB | ADMISSIBLE |
| SIEMENS GAMESA RENEWABLE ENERGY | Dec 5, 2019 | SGRE ASSOCIATION | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1520983 |
| DESCRIPTION | US2009269392 |
| DESCRIPTION | US2012014804 |
| DESCRIPTION | WO2006082479 |
| DESCRIPTION | WO2011088372 |
| EXAMINATION | US2008277053 |
| EXAMINATION | US2009169392 |
| INTERNATIONAL-SEARCH-REPORT | EP1520983 |
| INTERNATIONAL-SEARCH-REPORT | WO2009059604 |
| INTERNATIONAL-SEARCH-REPORT | WO2011088372 |
| INTERNATIONAL-SEARCH-REPORT | WO2011135306 |
| OPPOSITION | DE102009024324 |
| OPPOSITION | DE102012104238 |
| OPPOSITION | EP1520983 |
| OPPOSITION | EP1754589 |
| OPPOSITION | EP1990178 |
| OPPOSITION | EP2341239 |
| OPPOSITION | EP2444660 |
| OPPOSITION | EP2497945 |
| OPPOSITION | EP2567807 |
| OPPOSITION | GB2497578 |
| OPPOSITION | US2008277053 |
| OPPOSITION | US2009169392 |
| OPPOSITION | US2009220747 |
| OPPOSITION | US2010143142 |
| OPPOSITION | US2011135485 |
| OPPOSITION | US2012027609 |
| OPPOSITION | US2012093656 |
| OPPOSITION | US7841835 |
| OPPOSITION | WO03008800 |
| OPPOSITION | WO2006082479 |
| OPPOSITION | WO2009059604 |
| OPPOSITION | WO2011004540 |
| OPPOSITION | WO2011088372 |
| OPPOSITION | WO2011135306 |
| OPPOSITION | WO2013087078 |
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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Mar 18, 2019
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Decision to grant a European patent
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(Electronic) Receipt
Search/Exam
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French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Sep 26, 2018
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Letter accompanying subsequently filed items
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May 30, 2017
Feb 1, 2017
Annex to the communication
Search/Exam
Feb 1, 2017
Communication from the Examining Division
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Jan 26, 2017
Examination started
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Amended claims with annotations
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Jan 29, 2015
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Amended description with annotations
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Jan 29, 2015
Amendments received before examination
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Jan 29, 2015
Letter accompanying subsequently filed items
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Sep 24, 2014
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Communication to designated inventor
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Communication to designated inventor
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Jul 21, 2014
Communication to designated inventor
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Jun 20, 2014
(Electronic) Receipt
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Request for entry into the European phase
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Apr 25, 2014
Information on entry into European phase
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Jul 11, 2013
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Copy of the international search report
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Jun 20, 2013
Published international application - A1
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Mar 11, 2013
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Dec 11, 2012
Abstract
PCTISA
Dec 11, 2012
Annex
PCTISA
Dec 11, 2012
Claims
PCTISA
Dec 11, 2012
Description
PCTISA
Dec 11, 2012
Drawings
PCTISA