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The patent EP4237587 was granted to Primetals Austria on Aug 28, 2024. The application was filed on Oct 28, 2021 under application number EP21799055A. 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 |
|---|---|---|---|
| THYSSENKRUPP STEEL EUROPE | May 23, 2025 | THYSSENKRUPP STEEL EUROPE | ADMISSIBLE |
| ARCELORMITTAL | May 13, 2025 | LAVOIX | ADMISSIBLE |
| TATA STEEL IJMUIDEN | Apr 15, 2025 | GROUP SERVICES | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2012251186 |
| INTERNATIONAL-SEARCH-REPORT | US4728360 |
| INTERNATIONAL-SEARCH-REPORT | US5259865 |
| INTERNATIONAL-SEARCH-REPORT | US5417740 |
| INTERNATIONAL-SEARCH-REPORT | US6149709 |
| OPPOSITION | EP1354969 |
| OPPOSITION | EP3954786 |
| OPPOSITION | EP3992309 |
| OPPOSITION | EP4032990 |
| OPPOSITION | JP2012251186 |
| OPPOSITION | US2010180723 |
| OPPOSITION | US2015040722 |
| OPPOSITION | US2805930 |
| OPPOSITION | US4728360 |
| OPPOSITION | US5259865 |
| OPPOSITION | US5417740 |
| OPPOSITION | US6149709 |
| OPPOSITION | US6284018 |
| OPPOSITION | WO2021100565 |
| OTHER | US6284018 |
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 18, 2025
Dec 15, 2025
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Authorisation
OPPO
Dec 15, 2025
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Sep 10, 2024
Aug 1, 2024
Decision to grant a European patent
Search/Exam
Jul 18, 2024
(Electronic) Receipt
Search/Exam
Jul 18, 2024
English translation of the claims
Search/Exam
Jul 18, 2024
Filing of the translations of the claims
Search/Exam
Jul 18, 2024
French translation of claims
Search/Exam
Jul 18, 2024
Letter accompanying subsequently filed items
Search/Exam
May 8, 2024
May 8, 2024
May 8, 2024
May 8, 2024
Intention to grant (signatures)
Search/Exam
May 8, 2024
Text intended for grant (clean copy)
Search/Exam
May 8, 2024
Mar 22, 2024
(Electronic) Receipt
Search/Exam
Mar 22, 2024
Letter accompanying subsequently filed items
Search/Exam
Mar 22, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Intention to grant (signatures)
Search/Exam
Mar 19, 2024
Text intended for grant (clean copy)
Search/Exam
Mar 19, 2024
Feb 28, 2024
Examination started
Search/Exam
Aug 25, 2023
Aug 25, 2023
Aug 23, 2023
(Electronic) Receipt
Search/Exam
Aug 23, 2023
Letter accompanying subsequently filed items
Search/Exam
Aug 23, 2023
Non-patent literature filed by a third party
Search/Exam
Aug 23, 2023
Non-patent literature filed by a third party
Search/Exam
Aug 23, 2023
Non-patent literature filed by a third party
Search/Exam
Aug 23, 2023
Non-patent literature filed by a third party
Search/Exam
Aug 23, 2023
Observations by third parties
Search/Exam
Aug 23, 2023
Patent document filed by a Third party
Search/Exam
Aug 9, 2023
Jun 9, 2023
Jun 1, 2023
Priority search results copy provided by EPO
Search/Exam
Mar 28, 2023
Information regarding early processing
Search/Exam
Mar 22, 2023
(Electronic) Receipt
Search/Exam
Mar 22, 2023
Request for entry into the European phase
Search/Exam
Mar 13, 2023
Information on entry into European phase
Search/Exam
Oct 26, 2022
Oct 26, 2022
Oct 26, 2022
Oct 26, 2022
Oct 26, 2022
Oct 26, 2022
Oct 26, 2022
Sep 22, 2022
Notification of election of EPO
Search/Exam
Sep 13, 2022
Sep 7, 2022
Aug 30, 2022
Aug 30, 2022
PCT demand form
PCT2
Aug 30, 2022
Aug 30, 2022
Aug 30, 2022
Aug 30, 2022
May 23, 2022
May 5, 2022
Copy of the international search report
Search/Exam
May 5, 2022
Copy of the international search report
Search/Exam
May 5, 2022
Published international application - A1
Search/Exam
Dec 6, 2021
Nov 26, 2021
ISR: cited documents
PCTISA
Nov 26, 2021
Nov 26, 2021
Nov 26, 2021
Nov 26, 2021
Nov 16, 2021
Nov 15, 2021
Nov 10, 2021
Oct 28, 2021
(Electronic) Receipt
PCTRO
Oct 28, 2021
Abstract
PCTRO
Oct 28, 2021
Claims
PCTRO
Oct 28, 2021
Description
PCTRO
Oct 28, 2021
Oct 28, 2021
Drawings
PCTRO
Oct 28, 2021
Oct 28, 2021