Patent No. EP4032990 (titled "Method For Producing Molten Steel") was filed by Kabushiki Kaisha Kobe Seiko SHO Kobe Steel on Nov 11, 2020. The application was issued on Apr 24, 2024.

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 |
|---|---|---|
| THYSSENKRUPP STEEL EUROPE | Jan 23, 2025 | THYSSENKRUPP STEEL EUROPE |
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
Oct 29, 2026
Oct 22, 2026
Oct 20, 2026
Oct 20, 2026
Oct 20, 2026
Sep 4, 2026
Sep 2, 2026
Sep 2, 2026
Sep 2, 2026
Aug 31, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 10, 2026
Aug 5, 2026
Aug 5, 2026
Aug 5, 2026
May 7, 2026
Apr 30, 2026
Apr 30, 2026
Apr 30, 2026
Apr 13, 2026
Apr 13, 2026
Apr 13, 2026
Apr 13, 2026
Apr 13, 2026
Aug 25, 2025
Aug 19, 2025
Aug 19, 2025
Aug 19, 2025
Jun 5, 2025
Jun 2, 2025
Jun 2, 2025
Jun 2, 2025
Jun 2, 2025
Jun 2, 2025
Feb 7, 2025
Feb 7, 2025
Feb 3, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
Jan 23, 2025
May 8, 2024
Mar 28, 2024
Mar 12, 2024
Mar 12, 2024
Mar 12, 2024
Mar 12, 2024
Mar 12, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Dec 21, 2023
Dec 21, 2023
Dec 21, 2023
Dec 21, 2023
Dec 21, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 6, 2023
Jul 20, 2023
May 3, 2023
May 3, 2023
May 3, 2023
May 3, 2023
May 3, 2023
Nov 8, 2022
Oct 20, 2022
Oct 20, 2022
Oct 20, 2022
Oct 20, 2022
Oct 10, 2022
Jun 29, 2022
Jun 7, 2022
Jun 7, 2022
Apr 29, 2022
Apr 20, 2022
Apr 20, 2022
Apr 20, 2022
Apr 20, 2022
Apr 20, 2022
Apr 20, 2022
Apr 1, 2022
Jun 14, 2021
May 27, 2021
May 27, 2021
May 27, 2021