Patent No. EP3137641 (titled "Aluminum Sheet With Enhanced Formability And An Aluminum Container Made From Aluminum Sheet") was filed by Alcoa USA on Apr 30, 2015. The application was issued on Aug 21, 2024.

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 CENTERCONSTELLIUM NEUF BRISACHCONSTELLIUM MUSCLE SHOALS | Oct 7, 2020 | CONSTELLIUM PROPRIETE INDUSTRIELLE |
| NOVELIS | Oct 6, 2020 | WEICKMANN & WEICKMANN |
| NOVELIS | Oct 6, 2020 | 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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