The weekly litigation news digest is live. Subscribe now
The patent EP3683328 was granted to Posco on Aug 17, 2022. The application was filed on Sep 13, 2018 under application number EP18856660A. 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 |
|---|---|---|---|
| ARCELORMITTAL | May 17, 2023 | LAVOIX | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2008056995 |
| INTERNATIONAL-SEARCH-REPORT | JP2008231447 |
| INTERNATIONAL-SEARCH-REPORT | JP2017031452 |
| INTERNATIONAL-SEARCH-REPORT | KR20140009674 |
| INTERNATIONAL-SEARCH-REPORT | KR20150048554 |
| OPPOSITION | EP2554687 |
| OPPOSITION | JP2006142339 |
| OPPOSITION | JP2008056995 |
| OPPOSITION | WO2019054769 |
| SEARCH | EP2554687 |
| SEARCH | EP2880192 |
| SEARCH | JP2008056995 |
| SEARCH | KR20120073644 |
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
Get instant alerts for new documents
Oct 2, 2025
(Electronic) Receipt
Appeal
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Oct 2, 2025
Aug 11, 2025
Aug 11, 2025
Aug 5, 2025
(Electronic) Receipt
Appeal
Aug 5, 2025
Aug 5, 2025
Notice of appeal
Appeal
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Means of redress
OPPO
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
Jun 5, 2025
May 13, 2025
May 6, 2025
Apr 30, 2025
Apr 30, 2025
Apr 30, 2025
Apr 29, 2025
Apr 28, 2025
Apr 28, 2025
Apr 28, 2025
Mar 18, 2025
Mar 18, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Sep 17, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 12, 2024
Sep 12, 2024
Sep 12, 2024
Nov 13, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Jun 29, 2023
Jun 29, 2023
Jun 27, 2023
Jun 14, 2023
Jun 14, 2023
Jun 14, 2023
May 26, 2023
May 24, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
Mar 24, 2023
Mar 20, 2023
Letter accompanying subsequently filed items
Search/Exam
Mar 20, 2023
Jan 11, 2023
Jan 4, 2023
Annexes in respect of a client data request
Search/Exam
Jan 4, 2023
Annexes in respect of a client data request
Search/Exam
Jan 4, 2023
Dec 16, 2022
(Electronic) Receipt
Search/Exam
Dec 16, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 10, 2022
Oct 26, 2022
Annexes in respect of a client data request
Search/Exam
Oct 26, 2022
Annexes in respect of a client data request
Search/Exam
Oct 26, 2022
General authorisation
Search/Exam
Oct 26, 2022
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2022
Oct 20, 2022
Sep 28, 2022
Annexes in respect of a client data request
Search/Exam
Sep 28, 2022
Annexes in respect of a client data request
Search/Exam
Sep 28, 2022
Letter accompanying subsequently filed items
Search/Exam
Sep 28, 2022
Aug 30, 2022
Jul 21, 2022
Decision to grant a European patent
Search/Exam
Jul 8, 2022
(Electronic) Receipt
Search/Exam
Jul 8, 2022
Filing of the translations of the claims
Search/Exam
Jul 8, 2022
French translation of claims
Search/Exam
Jul 8, 2022
German translation of the claims
Search/Exam
Jul 8, 2022
Letter accompanying subsequently filed items
Search/Exam
Mar 30, 2022
Mar 30, 2022
Mar 30, 2022
Intention to grant (signatures)
Search/Exam
Mar 30, 2022
Text intended for grant (clean copy)
Search/Exam
Mar 30, 2022
Feb 23, 2022
Examination started
Search/Exam
Feb 17, 2022
Feb 3, 2022
(Electronic) Receipt
Search/Exam
Feb 3, 2022
Enquiry as to the processing of the file
Search/Exam
Feb 3, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 27, 2020
(Electronic) Receipt
Search/Exam
Nov 27, 2020
Nov 27, 2020
Amended claims with annotations
Search/Exam
Nov 27, 2020
Amendments received before examination
Search/Exam
Nov 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Jul 3, 2020
Jun 26, 2020
Letter which had not been notified
Search/Exam
Jun 24, 2020
Notification of forthcoming publication
Search/Exam
May 28, 2020
May 7, 2020
May 7, 2020
European search opinion
Search/Exam
May 7, 2020
Information on Search Strategy
Search/Exam
May 7, 2020
Supplementary European search report
Search/Exam
Apr 23, 2020
Search started
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 17, 2020
Communication to designated inventor
Search/Exam
Apr 1, 2020
Apr 1, 2020
Mar 18, 2020
(Electronic) Receipt
Search/Exam
Mar 18, 2020
Abstract
Search/Exam
Mar 18, 2020
Mar 18, 2020
Amended claims with annotations
Search/Exam
Mar 18, 2020
Mar 18, 2020
Amended description with annotations
Search/Exam
Mar 18, 2020
Claims
Search/Exam
Mar 18, 2020
Description
Search/Exam
Mar 18, 2020
Drawings
Search/Exam
Mar 18, 2020
Request for entry into the European phase
Search/Exam
Jan 24, 2020
Information on entry into European phase
Search/Exam
Apr 11, 2019
Apr 11, 2019
Apr 11, 2019
Mar 21, 2019
Copy of the international search report
Search/Exam
Mar 21, 2019
Mar 21, 2019
International publication pamphlet
Search/Exam