Patent No. EP3972883 (titled "Rail Vehicle") was filed by Siemens Mobility on Jun 22, 2020. The application was issued on May 3, 2023.

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 |
|---|---|---|
| ALSTOM | Feb 2, 2024 | ZIMMERMANN & PARTNER PATENTANWALTE MBB |
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
Aug 12, 2026
Aug 7, 2026
Aug 7, 2026
Aug 7, 2026
Aug 7, 2026
Aug 7, 2026
Aug 7, 2026
Jul 17, 2026
Jul 14, 2026
Jul 14, 2026
Jul 14, 2026
Jan 13, 2026
Jan 13, 2026
Jan 13, 2026
Jan 13, 2026
Jan 13, 2026
Sep 4, 2025
Aug 20, 2025
Aug 20, 2025
Aug 20, 2025
Aug 20, 2025
Aug 22, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Jun 21, 2024
Jun 17, 2024
Jun 17, 2024
Jun 17, 2024
Feb 19, 2024
Feb 19, 2024
Feb 9, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
Feb 2, 2024
May 16, 2023
Apr 6, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Feb 1, 2023
Jan 26, 2023
Jan 26, 2023
Dec 22, 2022
Dec 22, 2022
Dec 22, 2022
Dec 22, 2022
Dec 22, 2022
Dec 22, 2022
Nov 29, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Jul 11, 2022
Mar 2, 2022
Feb 7, 2022
Jan 19, 2022
Jan 14, 2022
Dec 22, 2021
Dec 22, 2021
Dec 22, 2021
Dec 3, 2021
Feb 15, 2021
Jan 28, 2021
Jan 28, 2021
Jan 28, 2021
Jul 20, 2020
Jul 14, 2020
Jun 22, 2020
Jun 22, 2020
Jun 22, 2020
Jun 22, 2020
Jun 22, 2020
Jun 22, 2020
Jun 22, 2020