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The patent EP4107836 was granted to Hitachi Energy on Jul 19, 2023. The application was filed on Apr 23, 2020 under application number EP20721203A. 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 |
|---|---|---|---|
| GENERAL ELECTRIC TECHNOLOGY | Apr 17, 2024 | POTTER CLARKSON | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | CN108429272 |
| INTERNATIONAL-SEARCH-REPORT | EP2683077 |
| INTERNATIONAL-SEARCH-REPORT | EP3534522 |
| INTERNATIONAL-SEARCH-REPORT | US2019109461 |
| INTERNATIONAL-SEARCH-REPORT | WO03007455 |
| OPPOSITION | CN108429272 |
| OPPOSITION | CN108494002 |
| OPPOSITION | CN109768582 |
| OPPOSITION | CN110474347 |
| OPPOSITION | CN110601272 |
| OPPOSITION | CN110739721 |
| OPPOSITION | CN110994680 |
| OPPOSITION | EP2683075 |
| OPPOSITION | EP2683077 |
| OPPOSITION | EP3534522 |
| OPPOSITION | EP3780310 |
| OPPOSITION | JP2019080476 |
| OPPOSITION | US2019109461 |
| OPPOSITION | WO03000745 |
| OPPOSITION | WO2019187411 |
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 23, 2025
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Dec 8, 2025
(Electronic) Receipt
Appeal
Dec 8, 2025
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Notice of appeal
Appeal
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OPPO
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Oct 30, 2023
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(Electronic) Receipt
Search/Exam
Oct 23, 2023
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Letter concerning fees and payments
Search/Exam
Oct 6, 2023
Annexes in respect of a client data request
Search/Exam
Oct 6, 2023
General authorisation
Search/Exam
Oct 6, 2023
Letter accompanying subsequently filed items
Search/Exam
Oct 6, 2023
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Decision to grant a European patent
Search/Exam
Jun 9, 2023
(Electronic) Receipt
Search/Exam
Jun 9, 2023
Filing of the translations of the claims
Search/Exam
Jun 9, 2023
French translation of claims
Search/Exam
Jun 9, 2023
German translation of the claims
Search/Exam
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Intention to grant (signatures)
Search/Exam
Feb 14, 2023
Text intended for grant (clean copy)
Search/Exam
Feb 14, 2023
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Examination started
Search/Exam
Nov 30, 2022
Nov 8, 2022
Change to the inventor details
Search/Exam
Nov 2, 2022
(Electronic) Receipt
Search/Exam
Nov 2, 2022
(Electronic) Receipt
Search/Exam
Nov 2, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 2, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 2, 2022
Letter concerning the inventor
Search/Exam
Oct 31, 2022
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(Electronic) Receipt
Search/Exam
Sep 21, 2022
Request for entry into the European phase
Search/Exam
Sep 2, 2022
Information on entry into European phase
Search/Exam
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Written opinion
PCT2
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Notification of election of EPO
Search/Exam
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PCT demand form
PCT2
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PCT2
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Notification of the recording of a change
Search/Exam
Oct 28, 2021
Copy of the international search report
Search/Exam
Oct 28, 2021
Published international application - A1
Search/Exam
Mar 12, 2021
Oct 8, 2020
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Apr 23, 2020
(Electronic) Receipt
PCTRO
Apr 23, 2020
Abstract
PCTRO
Apr 23, 2020
Claims
PCTRO
Apr 23, 2020
Description
PCTRO
Apr 23, 2020
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Drawings
PCTRO
Apr 23, 2020