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The patent EP2887524 was granted to Tokyo Institute OF Technology on Aug 11, 2021. The application was filed on Aug 20, 2012 under application number EP12883406A. 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 |
|---|---|---|---|
| HITACHI ENERGY | May 11, 2022 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | WO2009139077 |
| INTERNATIONAL-SEARCH-REPORT | WO2009144987 |
| OPPOSITION | CN102158112 |
| OPPOSITION | EP2485384 |
| OPPOSITION | EP2784927 |
| OPPOSITION | JP2003274559 |
| OPPOSITION | JP2008306805 |
| OPPOSITION | JP2011182517 |
| OPPOSITION | JP2012044839 |
| OPPOSITION | US2010020577 |
| OPPOSITION | US2011075465 |
| OPPOSITION | US2011194323 |
| OPPOSITION | US2011280049 |
| OPPOSITION | US7986535 |
| OPPOSITION | WO2009139077 |
| OPPOSITION | WO2009144987 |
| OPPOSITION | WO2010145708 |
| OPPOSITION | WO2011067090 |
| OPPOSITION | WO2011082935 |
| OPPOSITION | WO2011129223 |
| OPPOSITION | WO2012099176 |
| SEARCH | EP2485384 |
| SEARCH | JP2011182517 |
| SEARCH | WO2010145708 |
| SEARCH | WO2011129223 |
| SEARCH | WO2012099176 |
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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May 2, 2025
May 2, 2025
May 2, 2025
Apr 15, 2025
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Apr 3, 2025
Apr 1, 2025
(Electronic) Receipt
Appeal
Apr 1, 2025
Apr 1, 2025
Mar 20, 2025
Mar 20, 2025
Mar 10, 2025
Mar 7, 2025
(Electronic) Receipt
Appeal
Mar 7, 2025
Mar 7, 2025
Mar 4, 2025
Feb 28, 2025
(Electronic) Receipt
Appeal
Feb 28, 2025
(Electronic) Receipt
Appeal
Feb 28, 2025
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Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 17, 2024
Sep 27, 2024
Aug 20, 2024
Aug 14, 2024
(Electronic) Receipt
Appeal
Aug 14, 2024
Aug 14, 2024
Reply to appeal
Appeal
Apr 18, 2024
Apr 15, 2024
(Electronic) Receipt
Appeal
Apr 15, 2024
Apr 15, 2024
Feb 19, 2024
Feb 19, 2024
Jan 26, 2024
(Electronic) Receipt
Appeal
Jan 26, 2024
Jan 26, 2024
Notice of appeal
Appeal
Dec 15, 2023
Dec 15, 2023
Dec 14, 2023
Dec 14, 2023
Dec 14, 2023
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Dec 14, 2023
Means of redress
OPPO
Dec 14, 2023
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Authorisation
OPPO
May 25, 2023
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Aug 24, 2021
Jul 15, 2021
Decision to grant a European patent
Search/Exam
Jul 15, 2021
Payment submission rejected
Search/Exam
Jul 5, 2021
(Electronic) Receipt
Search/Exam
Jul 5, 2021
Filing of the translations of the claims
Search/Exam
Jul 5, 2021
French translation of claims
Search/Exam
Jul 5, 2021
German translation of the claims
Search/Exam
Mar 15, 2021
Mar 15, 2021
Mar 15, 2021
Text intended for grant (clean copy)
Search/Exam
Mar 15, 2021
Mar 12, 2021
Intention to grant (signatures)
Search/Exam
Mar 27, 2020
(Electronic) Receipt
Search/Exam
Mar 27, 2020
Amended claims with annotations
Search/Exam
Mar 27, 2020
Claims
Search/Exam
Mar 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 27, 2020
Nov 28, 2019
Annex to the communication
Search/Exam
Nov 28, 2019
Communication from the Examining Division
Search/Exam
May 17, 2018
(Electronic) Receipt
Search/Exam
May 17, 2018
Amended claims with annotations
Search/Exam
May 17, 2018
Claims
Search/Exam
May 17, 2018
Letter accompanying subsequently filed items
Search/Exam
May 17, 2018
May 17, 2018
May 17, 2018
Submission concerning representation
Search/Exam
Jan 19, 2018
Annex to the communication
Search/Exam
Jan 19, 2018
Communication from the Examining Division
Search/Exam
Jan 8, 2018
Examination started
Search/Exam
Dec 27, 2016
(Electronic) Receipt
Search/Exam
Dec 27, 2016
Dec 27, 2016
Amended claims with annotations
Search/Exam
Dec 27, 2016
Dec 27, 2016
Amendments received before examination
Search/Exam
Dec 27, 2016
Letter accompanying subsequently filed items
Search/Exam
Jun 28, 2016
Jun 10, 2016
Jun 10, 2016
European search opinion
Search/Exam
Jun 10, 2016
Information on Search Strategy
Search/Exam
Jun 10, 2016
Supplementary European search report
Search/Exam
May 24, 2016
Search started
Search/Exam
Dec 4, 2015
Nov 30, 2015
May 28, 2015
Notification of forthcoming publication
Search/Exam
Mar 27, 2015
Mar 25, 2015
Communication to designated inventor
Search/Exam
Mar 25, 2015
Communication to designated inventor
Search/Exam
Mar 10, 2015
Mar 10, 2015
Feb 3, 2015
Jan 26, 2015
(Electronic) Receipt
Search/Exam
Jan 26, 2015
Letter accompanying subsequently filed items
Search/Exam
Jan 26, 2015
Notification of the recording of a change
Search/Exam
Jan 26, 2015
Jan 8, 2015
Notification of the recording of a change
Search/Exam
Dec 5, 2014
Information regarding early processing
Search/Exam
Nov 11, 2014
(Electronic) Receipt
Search/Exam
Nov 11, 2014
Abstract
Search/Exam
Nov 11, 2014
Claims
Search/Exam
Nov 11, 2014
Description
Search/Exam
Nov 11, 2014
Drawings
Search/Exam
Nov 11, 2014
Request for entry into the European phase
Search/Exam
Feb 27, 2014
Copy of the international search report
Search/Exam
Feb 27, 2014
Feb 27, 2014
International publication pamphlet
Search/Exam