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The patent EP3398803 was granted to Alstom on Nov 23, 2022. The application was filed on Apr 27, 2018 under application number EP18169700A. 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 |
|---|---|---|---|
| SIEMENS MOBILITY | Jul 6, 2023 | SIEMENS PATENT ATTORNEYS | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | CN101037091 |
| OPPOSITION | DE202006008818U |
| OPPOSITION | EP2045116 |
| OPPOSITION | EP2599656 |
| OPPOSITION | FR2970455 |
| OPPOSITION | US2009288577 |
| OPPOSITION | US2011049909 |
| OPPOSITION | US2013263911 |
| OPPOSITION | US2015027339 |
| SEARCH | EP2045116 |
| SEARCH | EP2599656 |
| SEARCH | US2009288577 |
| SEARCH | US2011049909 |
| SEARCH | US2013263911 |
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
Dec 18, 2025
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Authorisation
OPPO
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Annex
OPPO
Aug 8, 2025
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Authorisation
OPPO
Aug 25, 2023
Authorisation
OPPO
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Dec 6, 2022
Oct 27, 2022
Decision to grant a European patent
Search/Exam
Oct 14, 2022
(Electronic) Receipt
Search/Exam
Oct 14, 2022
English translation of the claims
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Oct 14, 2022
Filing of the translations of the claims
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Oct 14, 2022
German translation of the claims
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Oct 14, 2022
Letter accompanying subsequently filed items
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Jul 14, 2022
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Intention to grant (signatures)
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Jul 14, 2022
Text intended for grant (clean copy)
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Jul 14, 2022
May 25, 2021
(Electronic) Receipt
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May 25, 2021
Amended claims with annotations
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May 25, 2021
Amended description with annotations
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May 25, 2021
Claims
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May 25, 2021
Description
Search/Exam
May 25, 2021
Letter accompanying subsequently filed items
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May 25, 2021
Mar 1, 2021
Annex to the communication
Search/Exam
Mar 1, 2021
Communication from the Examining Division
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Feb 23, 2021
Examination started
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May 7, 2019
(Electronic) Receipt
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May 7, 2019
May 7, 2019
Amended claims with annotations
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May 7, 2019
May 7, 2019
Amended description with annotations
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May 7, 2019
Amendments received before examination
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May 7, 2019
Letter accompanying subsequently filed items
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Mar 28, 2019
(Electronic) Receipt
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Mar 28, 2019
Letter accompanying subsequently filed items
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Nov 12, 2018
Oct 15, 2018
Refund of fees
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Oct 10, 2018
Notification of forthcoming publication
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Oct 5, 2018
Oct 5, 2018
European search opinion
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Oct 5, 2018
European search report
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Oct 5, 2018
Information on Search Strategy
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Sep 12, 2018
Search started
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Jun 27, 2018
Letter accompanying subsequently filed items
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Jun 27, 2018
Priority document
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Jun 20, 2018
Communication to designated inventor
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May 7, 2018
Priority search results copy provided by EPO
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Apr 27, 2018
Abstract
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Apr 27, 2018
Apr 27, 2018
Claims
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Apr 27, 2018
Description
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Apr 27, 2018
Designation of inventor
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Apr 27, 2018
Drawings
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Apr 27, 2018
Priority search results
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Apr 27, 2018
Request for grant of a European patent
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