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The patent EP3865753 was granted to Nippon Steel on Dec 7, 2022. The application was filed on Jul 24, 2019 under application number EP19870342A. The patent is currently recorded with a legal status of "Opposition Rejected".

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 |
|---|---|---|---|
| TENARIS CONNECTIONS | Sep 7, 2023 | BOULT WADE TENNANT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2012512347 |
| DESCRIPTION | US30647 |
| DESCRIPTION | US6158785 |
| DESCRIPTION | WO2015194193 |
| INTERNATIONAL-SEARCH-REPORT | JP2005523404 |
| INTERNATIONAL-SEARCH-REPORT | JP2012512347 |
| INTERNATIONAL-SEARCH-REPORT | JP2015534614 |
| INTERNATIONAL-SEARCH-REPORT | WO2015194193 |
| OPPOSITION | EP3473798 |
| OPPOSITION | JP2015534614 |
| OPPOSITION | US2006145476 |
| OPPOSITION | US2016186899 |
| OPPOSITION | US2017108151 |
| OPPOSITION | US2019203857 |
| OPPOSITION | US6158785 |
| OPPOSITION | USRE30647E |
| OPPOSITION | WO2012040275 |
| OPPOSITION | WO2014044773 |
| OPPOSITION | WO2015007579 |
| OPPOSITION | WO2015194193 |
| OPPOSITION | WO2018052141 |
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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Jul 16, 2025
Refund of fees
Appeal
Jul 10, 2025
Jul 10, 2025
Jul 9, 2025
Jul 8, 2025
(Electronic) Receipt
Appeal
Jul 8, 2025
Jul 8, 2025
Withdrawal of an appeal
Appeal
May 19, 2025
May 19, 2025
May 12, 2025
(Electronic) Receipt
Appeal
May 12, 2025
May 12, 2025
Notice of appeal
Appeal
Mar 10, 2025
Mar 10, 2025
Mar 10, 2025
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Mar 10, 2025
Means of redress
OPPO
Mar 10, 2025
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Description
OPPO
Jan 30, 2024
Description
OPPO
Jan 30, 2024
Jan 30, 2024
Sep 21, 2023
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Sep 13, 2023
Sep 7, 2023
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Dec 20, 2022
Nov 10, 2022
Decision to grant a European patent
Search/Exam
Oct 27, 2022
(Electronic) Receipt
Search/Exam
Oct 27, 2022
Filing of the translations of the claims
Search/Exam
Oct 27, 2022
French translation of claims
Search/Exam
Oct 27, 2022
German translation of the claims
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Oct 27, 2022
Letter accompanying subsequently filed items
Search/Exam
Aug 11, 2022
Aug 11, 2022
Aug 11, 2022
Intention to grant (signatures)
Search/Exam
Aug 11, 2022
Text intended for grant (clean copy)
Search/Exam
Aug 11, 2022
Jul 28, 2022
Examination started
Search/Exam
Apr 19, 2022
(Electronic) Receipt
Search/Exam
Apr 19, 2022
Apr 19, 2022
Amended claims with annotations
Search/Exam
Apr 19, 2022
Apr 19, 2022
Amended description with annotations
Search/Exam
Apr 19, 2022
Amendments received before examination
Search/Exam
Apr 19, 2022
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2021
Oct 7, 2021
Oct 7, 2021
Oct 7, 2021
Oct 7, 2021
European search opinion
Search/Exam
Oct 7, 2021
Information on Search Strategy
Search/Exam
Oct 7, 2021
Supplementary European search report
Search/Exam
Sep 28, 2021
Search started
Search/Exam
Sep 20, 2021
Document concerning representation
Search/Exam
Jul 21, 2021
Notification of forthcoming publication
Search/Exam
May 17, 2021
Apr 26, 2021
Apr 26, 2021
Feb 23, 2021
(Electronic) Receipt
Search/Exam
Feb 23, 2021
Abstract
Search/Exam
Feb 23, 2021
Claims
Search/Exam
Feb 23, 2021
Description
Search/Exam
Feb 23, 2021
Drawings
Search/Exam
Feb 23, 2021
Matter concerning the application
Search/Exam
Feb 23, 2021
Request for entry into the European phase
Search/Exam
Feb 19, 2021
Information on entry into European phase
Search/Exam
May 28, 2020
Apr 16, 2020
Copy of the international search report
Search/Exam
Apr 16, 2020
Apr 16, 2020
International publication pamphlet
Search/Exam