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The patent EP1633976 was granted to Energieonderzoek Centrum Nederland on Sep 9, 2020. The application was filed on Jun 14, 2004 under application number EP04748653A. 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 |
|---|---|---|---|
| SIEMENS GAMESA RENEWABLE ENERGY | Apr 12, 2018 | ASPACHER | WITHDRAWN |
| VATTENFALL | Apr 11, 2018 | ZACCO SWEDEN | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE10137272 |
| INTERNATIONAL-SEARCH-REPORT | WO2004011799 |
| OPPOSITION | DE10137272 |
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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OPPO
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Claims
OPPO
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OPPO
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Claims
OPPO
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Decision to grant a European patent
Search/Exam
May 31, 2017
(Electronic) Receipt
Search/Exam
May 31, 2017
Filing of the translations of the claims
Search/Exam
May 31, 2017
French translation of claims
Search/Exam
May 31, 2017
German translation of the claims
Search/Exam
May 31, 2017
Letter accompanying subsequently filed items
Search/Exam
Feb 9, 2017
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Intention to grant (signatures)
Search/Exam
Feb 9, 2017
Text intended for grant (clean copy)
Search/Exam
Feb 9, 2017
Aug 8, 2016
Sep 22, 2015
(Electronic) Receipt
Search/Exam
Sep 22, 2015
Amended claims with annotations
Search/Exam
Sep 22, 2015
Claims
Search/Exam
Sep 22, 2015
Letter accompanying subsequently filed items
Search/Exam
Sep 22, 2015
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Annex to the communication
Search/Exam
May 13, 2015
Communication from the Examining Division
Search/Exam
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Observations by third parties
Search/Exam
Dec 22, 2006
Claims
Search/Exam
Dec 22, 2006
Description
Search/Exam
Dec 22, 2006
Letter accompanying subsequently filed items
Search/Exam
Dec 22, 2006
Sep 19, 2006
Aug 28, 2006
Letter accompanying subsequently filed items
Search/Exam
Aug 28, 2006
Jun 19, 2006
Annex to the communication
Search/Exam
Jun 19, 2006
Communication from the Examining Division
Search/Exam
Apr 12, 2006
Notification of election of EPO
Search/Exam
Mar 16, 2006
Notification of the recording of a change
Search/Exam
Mar 3, 2006
Notification of the recording of a change
Search/Exam
Feb 1, 2006
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Dec 9, 2005
Letter accompanying subsequently filed items
Search/Exam
Dec 9, 2005
Translation of priority document
Search/Exam
Dec 8, 2005
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Request for entry into the European phase
Search/Exam
Oct 28, 2005
Information on entry into European phase
Search/Exam
Aug 29, 2005
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PCT demand form
PCT2
Apr 14, 2005
Jan 10, 2005
Dec 23, 2004
Copy of the international search report
Search/Exam
Dec 23, 2004
Published international application - A1
Search/Exam
Jul 9, 2004
Abstract
PCTISA
Jul 9, 2004
Claims
PCTISA
Jul 9, 2004
Description
PCTISA
Jul 9, 2004
Drawings
PCTISA