Patent No. EP3642375 (titled "Improved Thick Wrought 7Xxx Aluminum Alloys, And Methods For Making The Same") was filed by Arconic on Jun 21, 2018. The application was issued on May 14, 2025.

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 |
|---|---|---|
| CONSTELLIUM ISSOIREC TEC CONSTELLIUM TECHNOLOGY CENTER | Oct 4, 2022 | 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.
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