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The patent EP4102025 was granted to Nippon Steel on Jun 7, 2023. The application was filed on Jun 7, 2021 under application number EP21178068A. 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 |
|---|---|---|---|
| HYDRIL | Mar 7, 2024 | BOULT WADE TENNANT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE4345119 |
| OPPOSITION | EP3473798 |
| OPPOSITION | EP3514431 |
| OPPOSITION | EP3514432 |
| OPPOSITION | EP4027044 |
| OPPOSITION | GB1587836 |
| OPPOSITION | US2006145477 |
| OPPOSITION | US2007132239 |
| OPPOSITION | US2016186899 |
| OPPOSITION | US2021246737 |
| OPPOSITION | WO2007149673 |
| OPPOSITION | WO2010069491 |
| OPPOSITION | WO2014044773 |
| OPPOSITION | WO2016097049 |
| OPPOSITION | WO2020075365 |
| OPPOSITION | WO2021044862 |
| SEARCH | DE4345119 |
| SEARCH | US2016186899 |
| SEARCH | WO2019076622 |
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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Decision to grant a European patent
Search/Exam
Apr 27, 2023
(Electronic) Receipt
Search/Exam
Apr 27, 2023
(Electronic) Receipt
Search/Exam
Apr 27, 2023
Filing of the translations of the claims
Search/Exam
Apr 27, 2023
French translation of claims
Search/Exam
Apr 27, 2023
German translation of the claims
Search/Exam
Apr 27, 2023
Letter accompanying subsequently filed items
Search/Exam
Apr 27, 2023
Letter accompanying subsequently filed items
Search/Exam
Apr 27, 2023
Matter concerning the application
Search/Exam
Apr 27, 2023
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Intention to grant (signatures)
Search/Exam
Jan 3, 2023
Text intended for grant (clean copy)
Search/Exam
Jan 3, 2023
Dec 19, 2022
Nov 16, 2022
Notification of forthcoming publication
Search/Exam
Mar 18, 2022
(Electronic) Receipt
Search/Exam
Mar 18, 2022
Abstract
Search/Exam
Mar 18, 2022
Abstract
Search/Exam
Mar 18, 2022
Amended claims with annotations
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Mar 18, 2022
Amended description with annotations
Search/Exam
Mar 18, 2022
Claims
Search/Exam
Mar 18, 2022
Description
Search/Exam
Mar 18, 2022
Letter accompanying subsequently filed items
Search/Exam
Mar 18, 2022
Dec 1, 2021
Annex to the communication
Search/Exam
Dec 1, 2021
Communication from the Examining Division
Search/Exam
Nov 23, 2021
Annexes in respect of a client data request
Search/Exam
Nov 23, 2021
Annexes in respect of a client data request
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Nov 23, 2021
Document concerning representation
Search/Exam
Nov 23, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 5, 2021
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European search report
Search/Exam
Nov 5, 2021
Information on Search Strategy
Search/Exam
Oct 26, 2021
Search started
Search/Exam
Jun 18, 2021
Change to the inventor details
Search/Exam
Jun 9, 2021
(Electronic) Receipt
Search/Exam
Jun 9, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 9, 2021
Jun 7, 2021
Abstract
Search/Exam
Jun 7, 2021
Jun 7, 2021
Claims
Search/Exam
Jun 7, 2021
Description
Search/Exam
Jun 7, 2021
Designation of inventor
Search/Exam
Jun 7, 2021
Drawings
Search/Exam
Jun 7, 2021
General authorisation
Search/Exam
Jun 7, 2021
Request for grant of a European patent
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