Patent No. EP3006579 (titled "Method Of Continuously Heat-Treating 7000-Series Aluminium Alloy Sheet Material") was filed by Aleris Aluminum Duffel Bvba on Dec 11, 2014. The application was issued on Jun 1, 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 |
|---|---|---|
| ARCONIC | Mar 7, 2018 | FORRESTERS |
| C TEC CONSTELLIUM TECHNOLOGY CENTER CONSTELLIUM NEUF BRISACH | Mar 6, 2018 | CONSTELLIUM PROPRIETE INDUSTRIELLE |
| LINDE | Mar 6, 2018 | GELLNER |
| NOVELIS | Mar 6, 2018 | WEICKMANN & WEICKMANN PARTMBB |
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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