Patent No. EP3956489 (titled "Method And Installation For Producing Aluminum Can Sheet") was filed by Hellenic Research Centre FOR Metals on Mar 1, 2021. The application was issued on Aug 9, 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 |
|---|---|---|
| C TEC CONSTELLIUM TECHNOLOGY CENTER CONSTELLIUM NEUF BRISACH CONSTELLIUM MUSCLE SHOALS CONSTELLIUM ROLLED PRODUCTS SINGEN & COKG | May 2, 2024 | CONSTELLIUM PROPRIETE INDUSTRIELLE |
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
Feb 5, 2026
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 2, 2025
Sep 3, 2025
Sep 1, 2025
Sep 1, 2025
Sep 1, 2025
Sep 1, 2025
Sep 1, 2025
Sep 1, 2025
Sep 1, 2025
Aug 7, 2025
Aug 5, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Jul 30, 2025
Jul 30, 2025
Jul 30, 2025
Jul 28, 2025
Jul 28, 2025
Jul 28, 2025
Jul 28, 2025
Jan 2, 2025
Jan 2, 2025
Jan 2, 2025
Jan 2, 2025
Jan 2, 2025
Sep 3, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
May 23, 2024
May 23, 2024
May 8, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
May 2, 2024
Aug 22, 2023
Jul 13, 2023
Jul 4, 2023
Jul 4, 2023
Jul 4, 2023
Jul 4, 2023
Jul 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Feb 23, 2023
Feb 23, 2023
Feb 23, 2023
Feb 23, 2023
Feb 23, 2023
Feb 7, 2023
Oct 4, 2022
Oct 4, 2022
Oct 4, 2022
Oct 4, 2022
Oct 4, 2022
Oct 4, 2022
Oct 4, 2022
Sep 19, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Aug 18, 2022
Aug 10, 2022
Aug 10, 2022
Aug 10, 2022
Jul 28, 2022
Jul 28, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 25, 2022
May 25, 2022
Jan 26, 2022
Jan 26, 2022
Jan 26, 2022
Jan 21, 2022
Dec 1, 2021
Nov 26, 2021
Nov 22, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Oct 28, 2021
Oct 28, 2021
Oct 28, 2021
Sep 27, 2021
Sep 10, 2021
Sep 10, 2021
May 7, 2021
May 3, 2021
May 3, 2021
May 3, 2021
May 3, 2021
Apr 30, 2021
Apr 30, 2021
Apr 28, 2021
Mar 18, 2021
Mar 11, 2021
Mar 10, 2021
Mar 5, 2021
Mar 1, 2021
Mar 1, 2021
Mar 1, 2021
Mar 1, 2021
Mar 1, 2021
Mar 1, 2021
Mar 1, 2021