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The patent EP3501724 was granted to Arcelormittal on Jun 1, 2022. The application was filed on Apr 17, 2015 under application number EP19155807A. 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 |
|---|---|---|---|
| ANDRITZ | Jan 26, 2023 | WIRNSBERGER & LERCHBAUM PATENTANWALTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0971044 |
| DESCRIPTION | EP2007545 |
| DESCRIPTION | WO2013014512 |
| OPPOSITION | DE102008006624 |
| OPPOSITION | DE102011002023 |
| OPPOSITION | EP0189806 |
| OPPOSITION | EP2737971 |
| OPPOSITION | JP2014050857 |
| OPPOSITION | KR20120089975 |
| OPPOSITION | US2014034622 |
| OPPOSITION | WO2013014481 |
| OPPOSITION | WO2013014512 |
| OPPOSITION | WO2013050855 |
| OPPOSITION | WO2014005041 |
| SEARCH | JP2005169444 |
| SEARCH | JPH06246475 |
| SEARCH | US2014003860 |
| SEARCH | WO2013014512 |
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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(Electronic) Receipt
Appeal
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Appeal
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Reply to appeal
Appeal
Jul 28, 2025
(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
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Appeal
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Notice of appeal
Appeal
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Appeal
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Notice of appeal
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OPPO
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Decision to grant a European patent
Search/Exam
Mar 17, 2022
Feb 21, 2022
(Electronic) Receipt
Search/Exam
Feb 21, 2022
English translation of the claims
Search/Exam
Feb 21, 2022
Filing of the translations of the claims
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Feb 21, 2022
German translation of the claims
Search/Exam
Feb 21, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 26, 2021
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(Electronic) Receipt
Search/Exam
Nov 22, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 22, 2021
Observations by third parties
Search/Exam
Oct 21, 2021
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Intention to grant (signatures)
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Oct 21, 2021
Text intended for grant (clean copy)
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Oct 21, 2021
Sep 28, 2021
(Electronic) Receipt
Search/Exam
Sep 28, 2021
Amended claims with annotations
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Sep 28, 2021
Amended description with annotations
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Sep 28, 2021
Claims
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Sep 28, 2021
Description
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Sep 28, 2021
Letter accompanying subsequently filed items
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Sep 28, 2021
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Intention to grant (signatures)
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May 28, 2021
Text intended for grant (clean copy)
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May 28, 2021
Jan 26, 2021
Decision to allow further processing
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Jan 15, 2021
(Electronic) Receipt
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Jan 15, 2021
Amended claims with annotations
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Jan 15, 2021
Amended description with annotations
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Jan 15, 2021
Claims
Search/Exam
Jan 15, 2021
Description
Search/Exam
Jan 15, 2021
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Request for further processing
Search/Exam
Nov 16, 2020
Jun 18, 2020
Annex to the communication
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Jun 18, 2020
Communication from the Examining Division
Search/Exam
Jun 12, 2020
Examination started
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Dec 24, 2019
(Electronic) Receipt
Search/Exam
Dec 24, 2019
Letter accompanying subsequently filed items
Search/Exam
Dec 24, 2019
Reply to Written Opinion prepared by the EPO
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Jul 1, 2019
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Refund of fees
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May 29, 2019
(Electronic) Receipt
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May 29, 2019
Letter accompanying subsequently filed items
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May 29, 2019
Notification of forthcoming publication
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May 29, 2019
Request for accelerated (early) publication
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May 27, 2019
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European search opinion
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May 27, 2019
European search report
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May 27, 2019
Information on Search Strategy
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May 21, 2019
Modified abstract
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May 16, 2019
Search started
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Apr 1, 2019
Communication to designated inventor
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Apr 1, 2019
Communication to designated inventor
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Apr 1, 2019
Communication to designated inventor
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Apr 1, 2019
Communication to designated inventor
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Feb 6, 2019
Abstract
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Feb 6, 2019
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Claims
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Feb 6, 2019
Description
Search/Exam
Feb 6, 2019
Designation of inventor
Search/Exam
Feb 6, 2019
Drawings
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Feb 6, 2019
Request for grant of a European patent
Search/Exam
Jan 20, 2017
Priority search results copy provided by EPO
Search/Exam
Nov 16, 2015