Patent No. EP2964800 (titled "Method Of Manufacturing An Al-Mg-Si Alloy Rolled Sheet Product With Excellent Formability") was filed by Aleris Aluminum Duffel Bvba on Feb 18, 2014. The application was issued on Jun 15, 2022.

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 |
|---|---|---|
| NOVELIS | May 9, 2018 | WEICKMANN & WEICKMANN PARTMBB |
| C TEC CONSTELLIUM TECHNOLOGY CENTER CONSTELLIUM NEUF BRISACH | May 4, 2018 | CONSTELLIUM PROPRIETE INDUSTRIELLE |
| HYDRO ALUMINIUM ROLLED PRODUCTS | May 4, 2018 | COHAUSZ & FLORACK |
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.
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